Because his followers in Jerusalem, particularly those around James continued, as Jesus had, to follow the Jewish faith alongside the messianic teaching. It was Paul who created the Greek Christ as against the Jewish Jesus and founded Christianity. What is striking about the Letter of James set against those of Paul is its Jewish theology. I believe, and faith is always a matter of belief, that the followers of Jesus practiced a radical Judaism and that Christianity rejected the teachings that Jesus subscribed to. He worshiped in the synagogue not in a church; he claimed he came not to change the Law , not to subvert the Jewish faith, he claimed he was the messiah ( a very Jewish concept) and he had come NOT to establish a new faith but to preach the coming of God’s Kingdom and the Year of Jubilee.