If one of my followers sins against you, go and point out what was wrong. But do it in private, just between the two of you. If that person listens, you have won back a follower.
But when I saw that they were not really obeying the truth that is in the good news, I corrected Peter in front of everyone and said: Peter, you are a Jew, but you live like a Gentile. So how can you force Gentiles to live like Jews?