Our nation is deeply, systematically racist, and no amount of "I'm not like that" changes that. Anti-racism activist Jane Elliott says it perfectly:
"If you, as a white person, would be happy to recieve the same treatment that our black citizens do in this society, please stand."
"Nobody's standing here. That says very plainly that you know what's happening, you know you don't want it for you, I want to know why you're so willing to accept it or allow it to happen to others."
I'm not standing either, and that makes me deeply ashamed.