Good question. I know this wasn't directed at me, but here's my two cents
Let's be honest about the reality of this situation. From my perspective of a white man who grew up in a relatively liberal part of California, I've seen many different kinds of racism personally; from my dad towards people of color (verbal racism, under his breath), from people of color towards me and from everything in between. I think it's safe to say that a good percentage of Americans are racist to some degree, from experiences I've had, I might put the number around 20%-30% harbor genuinely racist beliefs.
That's something that can only be changed by education, but people with those beliefs don't think they're bad, so there's no need for them to change them. So I think most of those people will have to die off before any significant change will happen
The issue is you can't force people to not be racist, you can only educate them, and if they don't want to be educated, then there's not much more you can do
I can't really blame black people or minorities for the way some members of their communities react to the circumstances of their life because of the systemic racism they face, could any of us say they wouldn't react in a similar way? I've found life as a white man extremely difficult at times, I would imagine that feeling would be greatly increased if I had to deal with half the bullshit minorities in America are faced with