What is the meaning of Galatians 2:12?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

For before certain men came from James, he used to eat with the Gentiles. But when they arrived, he began to draw back and separate himself, for fear of those in the circumcision group.

Berean Standard Bible (BSB)

For before some people came from James, he ate with the Gentiles. But when they came, he drew back and separated himself, fearing those who were of the circumcision.

World English Bible (WEB)

For{G1063} before{G4253} that certain{G5100} came{G2064}{(G5629)} from{G575} James{G2385}, he did eat{G4906}{(G5707)} with{G3326} the Gentiles{G1484}: but{G1161} when{G3753} they were come{G2064}{(G5627)}, he withdrew{G5288}{(G5707)} and{G2532} separated{G873}{(G5707)} himself{G1438}, fearing{G5399}{(G5740)} them which were of{G1537} the circumcision{G4061}.

Strong's King James

(12) For prior to the coming of certain men of Yaakov, he used to eat with Gentile-peoples but when they came he avoided and separated himself in fear of those from the circumcision.

The F.O.G*

[12] Initially, he had no problem eating with Gentile believers. But when certain folks connected to James arrived, he started withdrawing and separating himself, afraid of criticism from those who insisted Gentiles must follow Jewish customs.

The F.O.G Paraphrase

for before the coming of certain from James, with the nations he was eating, and when they came, he was withdrawing and separating himself, fearing those of the circumcision,

Young's Literal Translation