In my looking, found some interesting info, and this is an excerpt from a summary post I made on another thread..."the Jewish-Christian Nazarenes, had been brought up through temple worship, circumcision, the Law. Although now saved through grace by the death and resurrection of Jesus the Messiah, in reality having spiritually passed into the New Covenant, still, they had walked in the ways of the Old Covenant, and actually continued to hold to many of the customs of the OC and the Law...yes, the Law.. The history of the Nazarenes shows that although they were known as the people of the Way, they still held to many of their Jewish customs...including continuing to worship in the temple! As you say, and as I was suggesting, primarily, Peter's ministry was to them, including his addressing some different realities that existed for them that did not exist for the gentiles, to whom Paul primarily ministered. No difference in What saved them, Who the source of their salvation was...yet a different people with different backgrounds, and truly different histories with God Himself, as it were.
The Nazarenes eventually scattered, the temple was destroyed, and one would think Christendom would have become a more united body..well, enter the RCC, then the Eastern Orthodox split, then the Reformation, then the Baptists, Methodists, AG, etc..."
