Jewish Christianity is the historical foundation of Early Christianity, which later developed into Nicene Christianity (which comprises the Catholic, Protestant, Eastern Orthodox, Oriental Orthodox, and Church of the East traditions) and other Christian denominations.

Jewish Christians were the followers of a Jewish religious sect that was viewed by the Sanhedrin as being heretical, which emerged in Roman Judea during the late Second Temple period, under the Herodian tetrarchy (1st century AD). These Jews believed that Jesus was the prophesied Messiah and they continued their adherence to Jewish law.

While previous scholarship viewed the First Jewish–Roman War and the destruction of the Second Temple (70 AD) as the main events, more recent scholarship tends to argue that the Bar Kochba revolt (132–136 AD) was the main factor in the separation of Christianity from Judaism. The split was a long-term process, in which the boundaries were not clear-cut.

Etymology

Early Jewish Christians (i.e., the Jewish followers of Jesus) referred to themselves as followers of "The Way" (: hė hodós), probably coming from , "I am the way and the truth and the life. No one comes to the Father except through me."

According to , the term Christian () was first used in reference to the disciples of Jesus in the city of Antioch, meaning "followers of Christ", by the non-Jewish inhabitants of Antioch. The earliest recorded use of the term Christianity () is attested by the ante-Nicene Father and theologian Ignatius of Antioch ().

The term Jewish Christian is used in the academic fields of Biblical studies and historiography of early Christianity in order to distinguish the early Christians of Jewish origins from those of Gentile origins, both in discussion of the New Testament church and the 2nd and 3rd centuries AD.

Origins

Christianity originated as a Jewish movement in Judaea during the 1st century AD, within the context of late Second Temple Judaism. The earliest followers of Jesus were Jews who understood his life, death and expected return through familiar Jewish apocalyptic and messianic frameworks. They remained embedded in Jewish religious life and did not initially conceive of themselves as departing from Israel or founding a new faith. Following their conviction that Jesus had been raised from the dead, Early Jewish Christianity maintained a high Christology alongside monotheism. This early community was led by the three Pillars of the Church, namely James the Just, Peter, and John. What eventually became of this earliest Christ-following community remains unclear; they were possibly displaced, relocated, or killed when the Romans destroyed Jerusalem in 70 AD. This had a formative effect on the emerging Christian identity as separate from Judaism. Over time, such developments contributed to the gradual differentiation between the Jesus movement and other Jewish communities, a process that resulted in the emergence of Christianity as a separate religion.

Jewish-Hellenistic background

Hellenism

Christianity arose as a separate movement within the syncretist Hellenistic world of the first century AD, dominated by Roman law and Greek culture. Hellenistic culture had a profound influence on the customs and practices of Jews, both in the Land of Israel and in the Diaspora. The inroads into Judaism gave rise to Hellenistic Judaism in the Jewish diaspora, which sought to establish a Hebraic-Jewish religious tradition within the culture and language of Hellenism.

According to Burton Mack and a minority of commentators, the Christian vision of Jesus's death for the redemption of humankind was only possible in a Hellenised milieu.

Jewish sects

During the early first century AD, there were many competing Jewish sects in the Holy Land, and those that became Rabbinic Judaism and Proto-orthodox Christianity were but two of these. There were Pharisees, Sadducees, and Zealots, but also other less influential sects, including the Essenes.

Jewish messianism has its root in the apocalyptic literature of the 2nd century BC to the 1st century AD, promising a future "anointed" leader or Messiah to resurrect the Israelite "Kingdom of God", in place of the foreign rulers of the time. According to Shaye J.D. Cohen, the fact that Jesus did not establish an independent Israel, combined with his death at the hands of the Romans, caused many Jews to reject him as the Messiah. Jews at that time were expecting a military leader as a Messiah, such as Bar Kokhba.

was another source of Jewish messianism, which was prompted by Pompey's conquest of Jerusalem in 63 BC. Early Christians cited this chapter to claim that Jesus was the Messiah and the son of god and negate Caesar's claim to the latter.

Early Jewish Christianity

thumb|The [[Cenacle on Mount Zion in Jerusalem, claimed to be the location of the Last Supper and Pentecost, and center of Jewish Christians in the first century]]

Most historians agree that Jesus or his followers established a new Jewish sect, one that attracted both Jewish and gentile converts. The self-perception, beliefs, customs, and traditions of the Jewish followers of Jesus, Jesus's disciples and first followers, were grounded in first-century Judaism. According to New Testament scholar Bart D. Ehrman, a number of early Christianities existed in the first century AD, from which developed various Christian traditions and denominations, including proto-orthodoxy, Marcionites, Gnostics and the Jewish followers of Jesus. According to theologian James D. G. Dunn, four types of early Christianity can be discerned: Jewish Christianity, Hellenistic Christianity, Apocalyptic Christianity, and early Catholicism.

The first followers of Jesus were essentially all ethnically Jewish or Jewish proselytes. Jesus was Jewish, preached to the Jewish people, and called from them his first followers. According to McGrath, Jewish Christians, as faithful religious Jews, "regarded their movement as an affirmation of every aspect of contemporary Judaism, with the addition of one extra belief – that Jesus was the Messiah."

Conversely, Margaret Barker argues that early Christianity has roots in pre-Babylonian exile Israelite religion. The Expositor's Greek Testament interprets as being critical of Judaism and Samaritanism. John Elliott also characterizes early Christianity as an 'Israelite sect' or a 'renewal movement within Israel', where followers were called 'Galileans', 'Nazarenes' or members of 'the Way' by the native inhabitants of 1st century Judea. Paul the Apostle's criticism of the contemporary Jewish community most likely derive from Hebrew Bible theology rather than internalized antisemitism.

Jewish Christians were the original members of the Jewish movement that later became Christianity. As Christianity grew and developed, Jewish Christians became only one strand of the early Christian community, characterised by combining the confession of Jesus as Christ with continued observance of the Torah Whereas a polemical account relating specifically to Jesus within the Babylonian Talmud (compiled centuries later), claims that Jesus was stoned and then was hung, for he [Jesus] practiced sorcery [Kishuf], incited people to idol worship Maisit, and led the Jewish people astray [Maddia].

Jerusalem ekklēsia

thumb|[[Icon of James by Emmanuel Tzanes, 1668]]

The Jerusalem Church was an early Christian community located in Jerusalem, of which James the Just, the brother of Jesus, and Peter were leaders. Paul was in contact with this community. Legitimised by Jesus' appearance, Peter was the first leader of the Jerusalem ekklēsia. He was soon eclipsed in this leadership by James the Just, "the Brother of the Lord," which may explain why the early texts contain scarce information about Peter. According to Lüdemann, in the discussions about the strictness of adherence to the Jewish Law, the more conservative view of James the Just became more widely accepted than the more liberal position of Peter, who soon lost influence. According to Dunn, this was not an "usurpation of power," but a consequence of Peter's involvement in missionary activities.

According to Eusebius' Church History 4.5.3–4: the first 15 Christian Bishops of Jerusalem were "of the circumcision". The Romans destroyed the Jewish leadership in Jerusalem in year 135 during the Bar Kokhba revolt, but it is traditionally believed the Jerusalem Christians waited out the Jewish–Roman wars in Pella in the Decapolis.

Beliefs

The Pauline epistles incorporate creeds, or confessions of faith, of a belief in an exalted Christ that predate Paul, and give essential information on the faith of the early Jerusalem Church around James, brother of Jesus. This group venerated the risen Christ, who had appeared to several persons, as in Philippians 2:6–11, the Christ hymn, which portrays Jesus as an incarnated heavenly being and a subsequently exalted one.

Messiah/Christ

Early Christians regarded Jesus to be the Messiah, the promised king who would restore the Jewish kingdom and independence. Jewish messianism has its root in the apocalyptic literature of the 2nd century BC to 1st century BC, promising a future "anointed" leader or messiah to restore the Israelite "Kingdom of God", in place of the foreign rulers of the time. This corresponded with the Maccabean Revolt directed against the Seleucid Empire. Following the fall of the Hasmonean kingdom, it was directed against the Roman administration of Judea Province, which, according to Josephus, began with the formation of the Zealots and Sicarii during the Census of Quirinius (6 AD), although full-scale open revolt did not occur until the First Jewish–Roman War in 66 AD.

Resurrection

According to the New Testament, people reported that they encountered Jesus after his crucifixion. They believed that he had been resurrected (belief in the resurrection of the dead in the Messianic Age was a core Pharisaic doctrine), and his resurrection provided the belief that he would soon return and fulfill the rest of Messianic prophecy such as the resurrection of the dead and the Last Judgment.

1 Corinthians 15:3-9 gives an early testimony, which was delivered to Paul, of the atonement of Jesus and the appearances of the risen Christ to "Cephas and the twelve", and to "James [...] and all the apostles", possibly reflecting a fusion of two early Christian groups:

The later canonical gospels provide more detailed narratives about the resurrection of Jesus. The New Testament accounts do not describe the resurrection itself, but rather accounts of appearances of Jesus. Jesus is described as the "firstborn from the dead", , the first to be raised from the dead, thereby acquiring the "special status of the firstborn as the preeminent son and heir". Scholars debate on the historicity of specific details of these narratives such as the empty tomb and burial of Jesus along with the resurrection itself. While Conservative Christian scholars argue in favor of a real, concrete, material resurrection of a transformed body, secular and Liberal Christian scholars typically argue in favor of more naturalistic explanations, such as the vision theory. Other scholars such as Craig L. Blomberg argue that there are sufficient arguments for the historicity of the resurrection. According to Géza Vermes, the concept of resurrection formed "the initial stage of the belief in his exaltation", which is "the apogee of the triumphant Christ". The focal concern of the early communities is the expected return of Jesus, and the entry of the believers into the kingdom of God with a transformed body.

Proponents of the vision theory argue that cognitive dissonance influenced the inspiration for resurrection belief. According to Bart Ehrman, the resurrection appearances were a denial response to his disciples' sudden disillusionment following Jesus' death. According to Ehrman, some of his followers claimed to have seen him alive again, resulting in a multitude of stories which convinced others that Jesus had risen from death and was exalted to Heaven. According to Paula Fredriksen, Jesus's influence on his followers was so great that they could not accept the failure implicit in his death. According to Fredriksen, before his death Jesus created amongst his believers such certainty that the Kingdom of God and the resurrection of the dead was at hand, that with few exceptions (John 20: 24–29) when they saw him shortly after his execution, they had no doubt that he had been resurrected, and the general resurrection of the dead was at hand. These specific beliefs were compatible with Second Temple Judaism.

According to N.T. Wright, "there is substantial unanimity among the early Christian writers (first and second century) that Jesus had been bodily raised from the dead," "with (as the early Christians in their different ways affirmed) a 'transphysical' body, both the same and yet in some mysterious way transformed," reasoning that as a matter of "inference" both a bodily resurrection and later bodily appearances of Jesus are far better explanations for the empty tomb and the 'meetings' and the rise of Christianity than are any other theories. Rejecting the visionary theories, Wright notes that visions of the dead were always associated with spirits and ghosts, and never with bodily resurrection. Thus, Wright argues, a mere vision of Jesus would never lead to the unprecedented belief that Jesus was a physically resurrected corpse; at most, he would be perceived as an exalted martyr standing at the right hand of God.

According to Johan Leman, the resurrection must be understood as a sense of presence of Jesus even after his death, especially during the ritual meals which were continued after his death. His early followers regarded him as a righteous man and prophet, who was therefore resurrected and exalted. In time, Messianistic, Isaiahic, apocalyptic and eschatological expectations were blended in the experience and understanding of Jesus, who came to be expected to return to earth.

Bodily resurrection

A point of debate is how Christians came to believe in a bodily resurrection, which was "a comparatively recent development within Judaism." According to Dag Øistein Endsjø, "The notion of the resurrection of the flesh was, as we have seen, not unknown to certain parts of Judaism in antiquity", but Paul rejected the idea of bodily resurrection, and it also can't be found within the strands of Jewish thought in which he was formed. According to Porter, Hayes and Tombs, the Jewish tradition emphasizes a continued spiritual existence rather than a bodily resurrection.

Nevertheless, the origin of this idea is commonly traced to Jewish beliefs, a view against which Stanley E. Porter objected. According to Porter, Jewish and subsequent Christian thought were influenced by Greek thoughts, where "assumptions regarding resurrection" can be found, which were probably adopted by Paul.

According to Dunn, the background of this hymn has been strongly debated. Some see it as influenced by a Greek worldview while others have argued for Jewish influences. According to Dunn, the hymn contains a contrast with the sins of Adam and his disobedience. Dunn further notes that the hymn may be seen as a three-stage Christology, starting with "an earlier stage of mythic pre-history or pre-existence," but regards the humility-exaltation contrast to be the main theme.

This belief in the incarnated and exalted Christ was part of Christian tradition a few years after his death and over a decade before the writing of the Pauline epistles.

According to Burton L. Mack the early Christian communities started with "Jesus movements", new religious movements centering on a human teacher called Jesus. A number of these "Jesus movements" can be discerned in early Christian writings. According to Mack, within these Jesus-movements developed within 25 years the belief that Jesus was the Messiah, and had risen from death.

According to Erhman, the gospels show a development from a "low Christology" towards a "high Christology". Yet, a "high Christology" seems to have been part of Christian traditions a few years after his death, and over a decade before the writing of the Pauline epistles, which are the oldest Christian writings.

Paul and the inclusion of gentiles

thumb|right|200px|[[Valentin de Boulogne's depiction of Saint Paul Writing His Epistles, c. 1618-1620 (Blaffer Foundation Collection, Houston, Texas)]]

Saul of Tarsus (Paul the Apostle)

According to Larry Hurtado, "the christology and devotional stance that Paul affirmed (and shared with others in the early Jesus-movement) was... a distinctive expression within a variegated body of Jewish messianic hopes." According to Dunn, Paul presents, in his epistles, a Hellenised Christianity. According to Ehrman, "Paul's message, in a nutshell, was a Jewish apocalyptic proclamation with a seriously Christian twist."

Paul was in contact with the early Christian community in Jerusalem, led by James the Just. Fragments of their beliefs in an exalted and deified Jesus, what Mack called the "Christ cult," can be found in the writings of Paul. According to the New Testament, Saul of Tarsus first persecuted the early Jewish Christians, but then converted. He adopted the name Paul and started proselytizing among the gentiles, adopting the title "Apostle to the Gentiles". Saint Peter, Paul and other Jewish Christians told the Jerusalem council that Gentiles were receiving the Holy Spirit, and so convinced the leaders of the Jerusalem Church to allow gentile converts exemption from most Jewish commandments at the Council of Jerusalem, which opened the way for a much larger Christian Church, extending far beyond the Jewish community.

While Paul was inspired by the early Christian apostles, his writings elaborate on their teachings, and also give interpretations which are different from other teachings as documented in the canonical gospels, early Acts and the rest of the New Testament, such as the Epistle of James.

Inclusion of gentiles

Some early Jewish Christians believed that non-Jews must convert to Judaism and adopt Jewish customs in order to be saved. Paul criticized Peter for himself declining to eat with gentiles during a visit by some of these Christians and therefore presenting a poor example to non-Jews joining the Christians. Paul's close coworker Barnabas sided with Peter in this dispute. Those that taught that gentile converts to Christianity ought to adopt more Jewish practices to be saved, however, were called "Judaizers". Though the Apostle Peter was initially sympathetic, the Apostle Paul opposed the teaching at the Incident at Antioch () and at the Council of Jerusalem (). Nevertheless, Judaizing continued to be encouraged for several centuries, particularly by Jewish Christians. will minister to the "circumcised" (in general Jews and Jewish proselytes) in Jerusalem, while Paul and his fellows will minister to the "uncircumcised" (in general, gentiles) (Galatians 2:9).

The Catholic Encyclopedia claims: "St. Paul's account of the incident leaves no doubt that St. Peter saw the justice of the rebuke." However, L. Michael White's From Jesus to Christianity claims: "The blowup with Peter was a total failure of political bravado, and Paul soon left Antioch as persona non grata, never again to return." Scholar James D. G. Dunn, who coined the phrase "New Perspective on Paul", has proposed that Peter was the "bridge-man" (i.e., the pontifex maximus) between the two other "prominent leading figures" of early Christianity: Paul and James, the brother of Jesus.

Hellenistic influences

Talmud scholar Daniel Boyarin has argued that Paul's theology of the spirit is more deeply rooted in Hellenistic Judaism than generally believed. In A Radical Jew, Boyarin argues that the Apostle Paul combined the life of Jesus with Greek philosophy to reinterpret the Hebrew Bible in terms of the Platonic opposition between the ideal (which is real) and the material (which is false). Judaism is a material religion, in which membership is based not on belief but rather descent from Abraham, physically marked by circumcision, and focusing on how to live this life properly. Paul saw in the symbol of a resurrected Jesus the possibility of a spiritual rather than corporeal Messiah. He used this notion of Messiah to argue for a religion through which all people—not just descendants of Abraham—could worship the God of Abraham. Unlike Judaism, which holds that it is the proper religion only of the Jews, Pauline Christianity claimed to be the proper religion for all people.

By appealing to the Platonic distinction between the material and the ideal, Paul showed how the spirit of Christ could provide all people a way to worship the God who had previously been worshipped only by Jews, Jewish proselytes and God-fearers, although Jews claimed that he was the one and only God of all. Boyarin roots Paul's work in Hellenistic Judaism and insists that Paul was thoroughly Jewish, but argues that Pauline theology made his version of Christianity appealing to gentiles. Boyarin also sees this Platonic reworking of both Jesus's teachings and Pharisaic Judaism as essential to the emergence of Christianity as a distinct religion, because it justified a Judaism without Jewish law. Historians continue to debate the precise moment when early Christianity established itself as a new religion, apart and distinct from Judaism. It is difficult to trace the process by which the two separated or to know exactly when this began. Jewish Christians continued to worship in synagogues together with fellow Jews for centuries. Some scholars have found evidence of continuous interactions between Jewish-Christian and Rabbinic movements from the mid-to late second century CE to the fourth century CE. Philip S. Alexander characterizes the question of when Christianity and Judaism parted company and went their separate ways as "one of those deceptively simple questions which should be approached with great care". The first centuries of belief in Jesus were characterized by great uncertainty and religious creativity. "Groups of believers coalesced into proto-factions of like-minded individuals, and then into factions. [...] The degree of doctrinal cohesion of these groups is unknown. As attested by the extant texts, confusion and chaos were rampant." At first, early belief in Jesus was very much a local phenomenon with some degree of coordination among communities on a regional basis.

Both Early Christianity and Early Rabbinic Judaism were far less orthodox and less theologically homogeneous than in modern day. Both religions were significantly influenced by Hellenistic religion and borrowed allegories and concepts from Classical Hellenistic philosophy and the works of the Greek-speaking Jewish authors of the end of the Second Temple period. The two schools of thought eventually firmed up their respective "norms" and doctrines, notably by increasingly diverging on key issues such as the status of "purity laws", the validity of Judeo-Christian messianic beliefs, and, more importantly, the use of Koine Greek and Latin as sacerdotal languages replacing Biblical Hebrew.

Trajectory

Heinrich Graetz postulated a Council of Jamnia in 90 that excluded Christians from the synagogues, but this is disputed. Jewish Christians continued to worship in synagogues for centuries.

Talmudist and professor of Jewish studies Daniel Boyarin proposes a revised understanding of the interactions between nascent Christianity and Judaism in late antiquity, viewing the two "new" religions as intensely and complexly intertwined throughout this period. According to Boyarin, Judaism and Christianity "were part of one complex religious family, twins in a womb", for at least three centuries. Alan Segal also states that "one can speak of a 'twin birth' of two new Judaisms, both markedly different from the religious systems that preceded them".

According to Robert Goldenberg, it is increasingly accepted among scholars that "at the end of the 1st century AD there were not yet two separate religions called 'Judaism' and 'Christianity.

Jewish Christianity fell into decline during the Jewish–Roman wars (66–135) and the growing anti-Judaism perhaps best personified by Marcion of Sinope (c. 150). With persecution by the Nicene Christians from the time of the Roman Emperor Constantine in the 4th century, Jewish Christians sought refuge outside the boundaries of the Empire, in Arabia and further afield. Within the Empire and later elsewhere it was dominated by the gentile-based Christianity which became the State church of the Roman Empire and which took control of sites in the Holy Land such as the Church of the Holy Sepulchre and the Cenacle and appointed subsequent Bishops of Jerusalem.

First Jewish–Roman War and the destruction of the Temple

Full-scale, open revolt against the Romans occurred with the First Jewish–Roman War in 66 AD. In 70 AD, Jerusalem was besieged and the Second Temple was destroyed. This event was a profoundly traumatic experience for the Jews, who were now confronted with difficult and far-reaching questions.