Galatians 2:12-13

Peter ate with the Christians at Antioch, who were both Jews and Gentiles, until some Jewish visitors came from Jerusalem (cf. Acts 10:28; Acts 11:3). They were from the group that believed Gentiles needed to undergo circumcision before they could become Christians. They were not "from James" in the sense that James endorsed their views; he did not (Galatians 2:9). Perhaps they came from the same church as James. When these men-Paul did not call them brethren-came, they intimidated Peter. He gradually separated from the Gentile Christians, evidently to avoid conflict. The other Jews living in Antioch followed Peter’s example, as did Barnabas. They were being hypocritical, saying one thing and doing another. Peter had a tendency to compromise his convictions when he was under pressure (cf. Matthew 16:16-23; Matthew 26:69-75; Mark 14:66-72; Luke 22:54-62; John 18:15-18; John 18:25-27).

"It is perhaps curious that nobody seems to have recalled that Jesus ate ’with publicans and sinners’, which can scarcely mean that he conformed to strict Jewish practice." [Note: Morris, p. 77. Cf. Mark 7:19.]