If and when I hear a racist joke and I call that person out on it and explain why I don't find it funny, I don't then run to all my friends (including black people) and tell them what I heard. 99.9% they're not going to laugh either. It's just common sense.
I learnt this not too long ago actually because I kept talking about the heated discussions we have on atrl and some of the disgusting things posted here. I've never seen my friend so upset and angry at the racism.
That was my fault. No one here spoke to my friend.