He's a young Black man and that comes from a community (Hip Hop) that as a whole consistently has made it very clear the amount of distrust and ill feelings that exist between Black males and the police. Simply because he's not KRS-1 or Chuck D does not mean he should "just shut up and rap". Many of his lyrics reference social issues like alcoholism, gang violence and his latest single is about self love and self esteem. If he were French and a top selling artist with a new album coming it would be very strange if an interviewer completely ignored what just happened in Paris. It's not really politics that he was asked about as much as life events. Rappers generally talk about life/hood events.