Too many people are under the mistaken impression that it's not PC to call out racism when a minority says something racist. Actually, not calling the out is a form of racism.
I had to deal with that years ago when I caught a young boy shoplifting. His granny went through the roof, saying I was targeting her grandson because he was black. Throughout the entire tirade, I never raised my voice, not even when she accused me of being KKK. I stopped, looked her in the eye to let her know her race baiting was a waste of time by saying in a normal speaking tone, "That sounds like a racist statement to me." She knew she was caught.