In Galatians 2, the main issue is traditionally thought to be "table fellow," but I am wondering if it was actually kosher food. Prior to this episode, in the congregation at Antioch, Jews and Gentiles shared meals together. But when "men from James" [head of the Jerusalem congregation] came, these emissaries insisted on eating separately. Peter joined them in this attitude, for which Paul publicly blamed him.
when Cephas came to Antioch I opposed him to his face, because he stood condemned. For before certain men came from James, he ate with the Gentiles; but when they came he drew back and separated himself, fearing the circumcision party. And with him the rest of the Jews acted insincerely, so that even Barnabas was carried away by their insincerity.
Recently I have wondered if the "men from James" were simply insisting on kosher food, which would have been difficult to obtain or too expensive for the general membership at Antioch. Underlying this may be the issue of "food sacrificed to idols," which is forbidden to Gentile believers in Acts 15 in on official letter to the Gentile churches. This dictum is nowhere mentioned in the writings of Paul. I know of no OT Law requiring Jews to eat separately from Gentiles.
Was the underlying issue in Gal. 2 a question of kosher food?
Acts 15: Then it seemed good to the apostles and the elders, with the whole church, to choose men from among them and send them to Antioch with Paul and Barnabas. They sent [them] with the following letter: “... it has seemed good to the Holy Spirit and to us to lay upon you no greater burden than these necessary things: that you abstain from what has been sacrificed to idols and from blood and from what is strangled[ and from unchastity. If you keep yourselves from these, you will do well. Farewell.”
1 Cor. 8: Food will not commend us to God. We are no worse off if we do not eat, and no better off if we do. Only take care lest this liberty of yours somehow become a stumbling block to the weak. For if any one sees you, a man of knowledge, at table in an idol’s temple, might he not be encouraged, if his conscience is weak, to eat food offered to idols?