These rhetorical questions are meant to affirm that Paul is not seeking to please people but God.1 This affirmation comes from the fact that he pronounces a curse on those who preach another gospel. He is not interested in living at peace with fellow believers
if those believers are denying the good news of Jesus Christ. It may be that Paul feels forced to make this statement because the distorters were saying that he relaxed the requirements of the gospel (circumcision and obedience to the Mosaic laws) in order to win converts.2
10 Et maintenant, est-ce la faveur des hommes que je désire, ou celle de Dieu? Est-ce que je cherche à plaire aux hommes? Si je plaisais encore aux hommes, je ne serais pas serviteur de Christ.