When Peter came to Antioch, I told him to his face that I was against what he was doing. He was clearly wrong.
References for Galatians 2:11
He used to eat with those who weren't Jews. But certain men came from the group that was led by James. When they arrived, Peter began to draw back. He separated himself from the non-Jews. He was afraid of the circumcision group.
Peter's actions were not honest. The other Jews joined him. Even Barnabas was led down the wrong path.
I saw what they were doing. It was not in line with the truth of the good news. So I spoke to Peter in front of them all. "You are a Jew," I said. "But you live like one who is not. So why do you force non-Jews to follow Jewish ways?"