I have 3% of Cherokee blood = I can not be racist
Could also work with " I can not be racist as I have a black friend "
What if added then " I mean friend is a big word but at least we don't insult each other when we cross ourselves randomly in the streets, not to say I cross him in the streets because he is a drug dealer or something "
Jokes aside in these days when you're taken for a racist or something, if it's not true and not in real life, just give it up, because Internet is full of people thinking they're judges or something, but where are the lawyers then ?
People condemn on presumptions, not on facts, so being guilty depends of emotions with them, not of reality.
So, for the sympathetic people, not a lot of risks, but for the outcasts...