NET
12 Until certain people came from James, he had been eating with the Gentiles. But when they arrived, he stopped doing this and separated himself because he was afraid of those who were pro-circumcision.
Darby
12 for before that certain came from James, he ate with [those of] the nations; but when they came, he drew back and separated himself, fearing those of [the] circumcision;
KJV
12 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.