John Chrysostom, on Gal 2:13

“And to his dissimulation the rest of the Jews consented, so that Barnabas also was led by them into that dissimulation.”

“"Insomuch that even Barnabas was carried away with their dissimulation." Be not surprised at his giving this proceeding the name of dissimulation, for he is unwilling, as I said before, to disclose the true state of the case, in order to the correction of his disciples. On account of their vehement attachment to the Law, he calls the present proceeding "dissimulation," and severely rebukes it, in order effectually to eradicate their prejudice. And Peter too, hearing this joins in the feint, as if he had erred, that they might be corrected by means of the rebuke administered to him. Had Paul reproved these Jews, they would have spurned at it with indignation, for they held him in slight esteem; but now, when they saw their Teacher silent under rebuke, they were unable to despise or resist Paul's sentence.”

Imported from an open dataset — not yet checked against the printed edition.