Slavery and racial oppressions, in fact, the concept of whiteness itself (which has nothing to do with biology or ancestry) are sins. Mortal sins that the very structures and society of America were founded on. And culpability in that SIN challenges the idea of white goodness that many white people internally subscribe to; rather than facing up to the fact of that culpability and the implications for one's moral state, a lot of white people would rather deny, deny, deny, even while their fellow human beings suffer so that they may maintain the illusion of goodness. Because it's much easier to pretend to be "woke", to pretend to care, to say the right things, then to actually live up to one's lofty ideals, or even simply to stop participating.
Just like there were not enough truly "Good Germans" during the Holocaust, there are not enough truly "Good Americans" within the charnelhouse of oppression that undergirds our society. Yes, it's better if you don't overly sign on to the bigotry. But if your response to a realistic assessment of the situation is "#notallwhitepeople" or "Trump voters aren't racist" or "I'm not racist, why are you singling me out?" then you're part of the problem.
And what makes the situation more infuriating is that, just as Germans suffered because of their racist, hateful leadership, so do Americans. Germany arguably got off lucky; there were many people who wished to carry out a counter-genocide against Germany. While there's no country that can defeat the US Military in a straight battlefield confrontation, the psychosis induced by racism and hatred exponentially increase the risk for nuclear war, catastrophic climate change, or another form of destruction that will eviscerate the American state just as surely. This is the product of white America refusing to acknowledge its sins. a
White people who subscribe to the system of white supremacy are sinners in the hands of a fucking pissed God, and the wages of sin are death, and the soul that sins must die. Even if you are not a believer, that doesn't change the fundamental nature of the narrative. People *will* burn for a sin of the magnitude of the oppression of black (and many other types of) bodies, whether it's in a hellish afterlife, in nuclear fire on earth, or in a burning atmosphere due to climate change.
The only way out is repentance - to face up to the oppressive reality of whiteness, and work in whatever way against it. Happily, it doesn't require every white person to take a bullet for a racist cop or spend every weekend marching - but it does ask that they examine their own place in the system, how they uphold "Whiteness" and reject it. Whether that's as simple as looking to one's true history and ethnicity (White is fake, but English, French, German, Greek, Italian are "real" and organic, granted those identities shouldn't be fetishized as they are also the natural product of mixing and evolution throughout the centuries). But the key is not to pretend one is "good" simply because they're not overtly racist.