Led by Jews.

http://www.vexen.co.uk/religion/ebionites.html#Ebionites

The first Christians were the Jews who believed that Jesus was the Jewish messiah. In his earliest work which mentions the Ebionites, Eusebius before 313CE writes that in a village called Choba, "there are Hebrews who believed in Christ, called Ebionites"3. They used an early Gospel of Matthew, and their beliefs are in accordance with the earliest reports of the gospels of Luke and Matthew, and with Jewish prophecy.

The Ebionites justified all of their beliefs by the example of Jesus himself: "he was circumcised, observed the Sabbath and celebrated the Jewish festivals, and taught that all the precepts of the law should be observed"

Their insistence on staying (or becoming) Jewish should not seem especially peculiar from a historical perspective, since Jesus and his disciples were Jewish. But the Ebionites' Jewishness did not endear them to most other Christians, who believed that Jesus allowed them to bypass the requirements of the Law for salvation. The Ebionites, however, maintained that their views were authorized by the original disciples, especially by Peter and Jesus' own brother, James, head of the Jerusalem church after the resurrection.

The 3 Pillars of Christianity, Peter, James and Paul.

Peter and James only taught christianity to other jews while Paul was to administer Christianity to the gentiles. ~ Galatians 1:18-2:10