My 2 cents...
Many years ago, I confidentially asked a black cop I knew what he thought about racial profiling. His reply: "it works."
A door swings both ways. Does the US systematically treat black people like crap? Yes. It does. Has from the beginning. No doubt. My question is: why? Like Jews who have been persecuted for 2500 years no matter where they go, I have to ask myself "are you doing something to bring this on?" Now, that's a slippery slope, because you can easily place all the blame on the affected party, and that's not fair. But I think there's broadly some shared blame here. Cops are fully aware that blacks, and especially black males, are statistically more prone to being violent... especially when confronted, and act accordingly.
The question here is: is that attitude systemic, or is it limited to certain cops? I think it's both. I think all cops know that when they approach a black male as a suspect, the odds of that breaking bad are good, but most attempt to de-escalate the situation, while some don't. Those are the ones who take it too far, and George Floyd was an example.
One thing is for sure: race has been the number one, under the table question on this continent since 20 slaves were brought to Jamestown. The treatment of blacks in the US is one issue, the presence of blacks among a predominately white culture into which they will never fully blend is another; blacks speak a white language (more or less), wear white clothes, live in white designed neighborhoods and houses, go to schools that are white oriented, and operated in a white consumerist culture... yet they never fully integrate no matter how many books you open at them or how many man pants you coax them into. American society is always going to have that ugly divide in it, and I see no viable solution.