The Jewish Encyclopedia article on Saul of Tarsus states:
According to Acts, Paul began working along the traditional Jewish line of proselytizing in the various synagogues where the proselytes of the gate [e.g., Exodus 20:9] and the Jews met; and only because he failed to win the Jews to his views, encountering strong opposition and persecution from them, did he turn to the Gentile world after he had agreed at a convention with the apostles at Jerusalem to admit the Gentiles into the Church only as proselytes of the gate, that is, after their acceptance of the Noachian laws (Acts 15:1–31)".[15]
The article "New Testament" states:
For great as was the success of Barnabas and Paul in the heathen world, the authorities in Jerusalem insisted upon circumcision as the condition of admission of members into the church, until, on the initiative of Peter, and of James, the head of the Jerusalem church, it was agreed that acceptance of the Noachian Laws — namely, regarding avoidance of idolatry, fornication, and the eating of flesh cut from a living animal — should be demanded of the heathen desirous of entering the Church.[16]
The Apostolic Decree of the Council of Jerusalem resolved this early Christian dispute by commending that gentiles obey Noahide law (Acts 15:19–21) rather than to live under the same dictates as Torah-observant Jews and be circumcised (cf. Acts 15:5, Acts 15:24).