There was a major controversy in the early church ( something I know we are not accustomed to today). Luke documents the controversy in Acts 15. There was one major division between Jew and Gentile.
The Acts 15 controversy centered on whether Gentile Christians should go through the same rituals that the Jewish Christians did. It was an issue of what qualified someone to be welcomed into the community. The Jewish Christians were not recognizing the Gentile Christians membership in the church.