en_tn/gal/02/13.md

this hypocrisy

Paul calls Peter's staying away from the Gentiles "this hypocrisy" because Peter was pretending to be like those Jews who say that Gentile Christians have to be circumcised.

Even Barnabas was led astray with them by their hypocrisy

Here to be "led astray" is a metaphor for being persuaded to do something wrong. Alternate translation: "Even Barnabas was persuaded to be a hypocrite because of them" (See: rc://en/ta/man/translate/figs-metaphor)