“For before that certain came from James, he did eat with the Gentiles: but when they were come, he withdrew and separated himself, fearing them which were of the circumcision.”
King James Version (KJV)
2:10 Of the poor - The poor Christians in Judea, who had lost all they had for Christ's sake.
2:11 But - The argument here comes to the height. Paul reproves Peter himself. So far was he from receiving his doctrine from man, or from being inferior to the chief of the apostles. When Peter - Afterwards, Came to Antioch - Then the chief of all the Gentile churches. I withstood him to the face, because he was to be blamed - For fear of man, #Gal 2:12|; for dissimulation, Gal 2:13; and for not walking uprightly. #Gal 2:14|.
2:13 And the other believing Jews - Who were at Antioch. Dissembled with him, so that even Barnabas was carried away with their dissimulation - Was borne away, as with a torrent, into the same ill practice.
2:14 I said to Cephas before them all - See Paul single against Peter and all the Jews! If thou being a Jew, yet livest, in thy ordinary conversation, after the manner of the gentiles - Not observing the ceremonial law, which thou knowest to be now abolished. Why compellest thou the gentiles - By withdrawing thyself and all the ministers from them; either to judaize, to keep the ceremonial law, or to be excluded from church communion ?
Ga 2:12 Before that certain came from James. Men sent from Jerusalem by James, who stood now at the head of that church. He used to eat with the Gentiles. See Ac 11:3. Peter had no scruples about eating with Gentile Christians; but many of the Jewish Christians did. Hence he did before the messengers came from James what he refused to do after they came, "separating himself" from the Gentile Christians at Antioch.