No, I'm right and you're wrong. They were a legalistic vegetarian cult that branched off the apostolic church resisting most of the apostles and violently opposing Paul falsely asserting that he had undergone a demoniacal hallucination when in reality Paul met Christ on the road to Damascus and been converted by Christ Himself.
It's completely fallacious to wrongly assert that the Ebionites represent the original Christian church when, in reality, they were a break away uber-legalistic sect from it with many of them eventually drifting into Gnosticism. You've obviously been reading the false assertions of Bauer and Ehrman. They have a completely false view of Christian history and theology so when you reassert their false assertions it's literally the blind leading the blind.
The Ebionites originated in Palestine and sought salvation through works via their unique modified version of the Mosaic law (including circumcision and the sabbath) in contradiction to Christ's fulfillment and introduction of a new covenant. They used only the Gospel of Matthew. It is possible that they also possessed a Gospel of the Hebrews, though this is reported only in later sources. By the time of Theodoret, they were extinct.
And the heretical 'Gospel of the Ebionites' is not canonical nor the earliest Christian publication. Matthew has been dated between A.D. 65 and 85; Mark, between the early A.D. 50s and 65; Luke, between the early A.D. 60s and 80s; and John, between the A.D. 60s and 90s. Though there will be some disagreement in the standard commentaries on the four Gospels about which decade in the first century a book was written, nearly all will place the time of writing in the first century.
By contrast, not one noncanonical Gospel has been dated earlier than the second century. The significance of this is that only the four Gospels were written during the apostolic age-that is, while the apostles were still alive and ministering. Other Gospels were written after this time.
The Gospel of the Ebionites itself is a non-canonical heretical "gospel" quoted by Epiphanius (fourth century) in his book Against Heresies. Epiphanius preserves seven quotations based on all three Gospels, primarily based on Matthew. Ebionite heretical teachings are evident in the quotations in contradiction to the mainstream apostolic early church.
Obviously what you omitted is that a wide gap existed between Ebionites and the orthodox early church (Origen Cont. Cels. 5.66; Eusebius Hist. Eccl. 3.27.17–4)
SO IT IS NOT SURPISING THAT EUSEBIUS ASSERTS THAT ALL EBIONITES HAD AN ABERRANT CHRISTOLOGY (Hist. Eccl. 3.27.1.6). Church fathers wrote that the Ebionites rejected both Jesus' virgin birth and his deity (see Companion to Second-Century Christian "Heretics," 247).
Irenaeus (c. 180), who first wrote about the Ebionites, stated that the Ebionites’ use of only Matthew’s Gospel misled them in their beliefs about the Lord (Irenaeus Haer. 3.11.7); that they rejected the virginal conception of Jesus, following Theodotion and Aquila in interpreting Isaiah 7:14 (“of a young woman,” Gk neanis; Lat adulescentula), thereby dissolving the divine plan and nullifying the God-given witness of the prophets (Irenaeus Haer. 3.21.2); and that consequently they denied the incarnate union of God and humanity, failing to discern the parallel with the creation of Adam in which God-breathed life united with and vivified the human substance (Irenaeus Haer. 5.1.3; cf. 4.33.4).
Misinterpreting scripture does not help Bauer, Ehrman, or you. Jesus fulfilled the old covenant that God had with the nation of Israel, accomplishing all that was necessary, and ushered in a new covenant. As a result, Christians are justified before God in Christ and endowed with God's Holy Spirit so that “the righteous requirements of the law might be fully met in us, who do not live according to the sinful nature but according to the Spirit” (Rom 8:4).
YOU are misinterpreting Isaiah, not me. Biblical scholars like Kaiser, W. C., Jr., Davids, P. H., Bruce, F. F., and Brauch, M. T. fully support the orthodox interpretation I'm using not to mention Matthew’s well-known quotation of Isaiah 7:14 in relation to the virgin birth (Matt. 1:23) also identifies Jesus as the fulfillment of Old Testament promises.
Not falsely. The original followers of Jesus were the Ebionites, as Eusebius called them. They were the Jewish Christians, though perhaps it is not really proper to give them the Christian label as they were strict followers of the Law. As Jesus said, "For truly, I say to you, until heaven and earth pass away, not an iota, not a dot, will pass from the Law until all is accomplished" (Matthew 5:18) and the Ebionites held to this command. These are the people who Paul persecuted. Eusebius says they did not accept the virgin birth. Note that "The Pauline epistles, the earliest surviving Christian writings, refer to Jesus' mother without stating that she was a virgin" so this might be a later development (Wikipedia). At the very least it seems not important enough to Paul for him to mention it.
Oh, Isaiah says nothing about a virgin birth. That's a mistranslation, and in any case it has nothing to do with the time of Jesus. When you read the whole passage you recognize that there is no connection.