They really are. No matter what white people do for them, enough is never enough. Even when you have nearly every white celebrity and politician bending over backwards and forwards to apologize for their "whiteness," they still say we're racist.
I've admitted before that I used to harbor white guilt. I look back at those times and regret it. I learned this hard lesson personally. No amount of self-hate and white guilt will ever absolve a white person in the eyes of most blacks. I say most because there are a rare few who know better. They're getting rarer these days.
In a way, their obsession with white racism is almost a self-fulfilling prophecy. Sometimes, it seems like they WANT whites to hate them. They WANT whites to be racist, because if they weren't then they'd have no way to feel validated.