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.

Christianity started with Jewish eschatological expectations, and it developed into the worship of Jesus as the result of his earthly ministry in Galilee and Jerusalem, his crucifixion, and the post-crucifixion experiences of his followers. Jewish Christians drifted apart from Second Temple Judaism, and their form of Judaism eventually became a minority strand within mainstream Judaism, as it had almost disappeared by the 5th century AD. Jewish–Christian gospels are lost except for fragments, so there is a considerable amount of uncertainty about the scriptures which were used by this group of Christians.

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" (: ), 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, they established a community in Jerusalem that awaited Jesus’s return and eschatological renewal, seeking to spread this message throughout Israel and the Jewish diaspora. 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.

Meanwhile, as the message about Jesus spread beyond Judea and Galilee into the broader Greco-Roman world, it increasingly attracted Gentile adherents, especially among "God-fearers": non-Jews who were attracted to Judaism and participated in synagogal worship without fully converting. This created a challenge for the movement's Jewish religious outlook, which insisted on close observance of the Jewish commandments. Against this backdrop, Paul the Apostle, a Jew of the Pharisaic school who had initially persecuted the Jesus movement, became one of its most influential missionaries following his conversion, focusing on spreading the message to non-Jews in the Eastern Mediterranean. Paul argued that Gentiles could participate in the promises of Israel through exclusive devotion to the God of Israel, faith in Christ, baptism, and participation in his death and resurrection, without full adherence to the Torah, including circumcision. 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.Wylen, Stephen M., The Jews in the Time of Jesus: An Introduction, Paulist Press (1995), , pp. 190–192; Dunn, James D.G., Jews and Christians: The Parting of the Ways, A.D. 70 to 135, Wm. B. Eerdmans Publishing (1999), , [pp. 33–34.; Boatwright, Mary Taliaferro & Gargola, Daniel J & Talbert, Richard John Alexander, The Romans: From Village to Empire, Oxford University Press (2004), , p. 426.

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. The first century BC and first century AD saw a growing number of charismatic religious leaders contributing to what would become the Mishnah of Rabbinic Judaism; the ministry of Jesus would lead to the emergence of the first Jewish Christian community.

The Gospels contain strong condemnations of the Pharisees, though there is a clear influence of Hillel's interpretation of the Torah in the Gospel sayings. However, certain laws followed the more stringent views of Shammai, such as regarding divorce. Belief in the resurrection of the dead in the Messianic age was a core Pharisaic doctrine.

Jewish and Christian messianism

Most of Jesus's teachings were intelligible and acceptable in terms of Second Temple Judaism; what set early Christians apart from Jews was their belief that Jesus was the Messiah. While Christianity acknowledges only one ultimate Messiah, Judaism can be said to hold to a concept of multiple messiahs. The two most frequently mentioned are the Messiah ben Joseph and the Messiah ben David. Some scholars have argued that the idea of two messiahs—one "suffering" and the other fulfilling the traditionally conceived messianic role—was normative to ancient Judaism, predating Jesus, as can be seen from the Dead Sea Scrolls. Many would have viewed Jesus as one or both.

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

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. In the earliest stage the community was made up of all those Jews who believed that Jesus was the Jewish messiah.McGrath, Alister E., Christianity: An Introduction. Blackwell Publishing (2006). . p. 174: "In effect, they [Jewish Christians] seemed to regard Christianity as an affirmation of every aspect of contemporary Judaism, with the addition of one extra belief – that Jesus was the Messiah. Unless males were circumcised, they could not be saved (Acts 15:1)." 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 and adherence to Jewish traditions such as Sabbath observance, Jewish calendar, Jewish laws and customs, circumcision, kosher diet and synagogue attendance, and by a direct kinship ties to the earliest followers of Jesus. 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].

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