Problem at school

This girl I know talks to these two guys who I find racists and offensive. I have stopped talking to them but she says she doesn't really get offended by what they say and it doesn't matter to her. A couple weeks ago one of the boys made a really racist and anti-Semitic edit of my friend's school photo and sent it to their group chat. My friend is not Jewish, but a picture like that can get the boy in lots of trouble. I told her she should tell someone (like a teacher or principal) but she says she doesn't want to get him in trouble. Me and some other classmates feel we should tell the administration, but don't want to disrespect the girl. What should we do ??