@Baldimo,
I hear what you're saying, but I think you miscalculate by a few degrees.
We are an amalgam or remnant of our ancestors and all the things that made them who they were. The stories and beliefs passed down through the generations of my family create a large part of who I am. The slave story in the US perverted the story of Africans who were forcibly transplanted to the US.
My stories, belief systems, and realities were vastly different than the stories passed down and experienced through the generations of black families across town. I think it's reasonable to say that the current relationship between poor blacks and law enforcement doesn't have to go back even as far as my own life to find the source of distrust and enmity. Jim Crow was in force during my life.
Have those stories been wiped clean from the lives of people still living that suffered abuse from cops? Dude, I would be telling my children to stay the hell away from cops. Not to ever trust them.
I believe if people can drop political beliefs for a minute and put themselves in the honest position of people who have suffered murderous abuse for over a hundred years, you might understand when they get pissed and chant stupid ****.
Black lives do matter. Why perpetuate the bullshit. Just let it go. After blowing off some steam, they will too.