Actually, they didn't. James, Peter and John explained/showed to Paul how many converts were zealous for the Law. They were converting heathens/non Jews to their religion at that time, which we today call Judaism. It had no name at that time.
>Actually, they didn’t. James, Peter and John explained/showed to Paul how many converts were zealous for the Law. They were converting heathens/non Jews to their religion at that time, which we today call Judaism. It had no name at that time.<
No, while Noahide laws may be seen being a requirement in Acts 15, Judaism did/does not preach, “Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost.” (Acts 2:38) which Peter did to 3k+ Jews, and afterward to other Jews and Gentiles as well (Acts 10). This was Christianity whether it was called that or not, and it was in Acts 11:26 that that the name Christian was given to those who previously were seen as distinctive from Judaism. In Acts 21, James did give the well-meaning advice for Paul to go to the Jewish celebration of Pentecost, which only showed that what the apostles preached (Acts 15) was unacceptable to Judaism. And John was certainly not preaching Noahide laws as a means of salvation either.