Gal.2.11

But when Peter was come to Antioch, I withstood him to the face, because he was to be blamed.

Gal.2.11

Here's the situation. Earlier, before certain persons had come from James, Peter regularly ate with the non-Jews. But when that conservative group came from Jerusalem, he cautiously pulled back and put as much distance as he could manage between himself and his non-Jewish friends. That's how fearful he was of the conservative Jewish clique that's been pushing the old system of circumcision.

Gal.2.11

When Peter came to Antioch, I opposed him to his face, because he was clearly in the wrong.

Gal.2.11

Now when Peter had come to Antioch, I withstood him to his face, because he was to be blamed;