There's a lot of people blaming cops, systemic racism or institutionalized racism.
The reason is genetics. Blacks are genetically more impulsive. It affects their sex(fatherlessness) their spending habits(poverty) their propensity for using drugs, and of course, their anger and propensity for property crime and violent crime. If you commit more violent crime, you're more likely to have violent relations with police. But no one wants to admit these facts.
Proof? If crime statistics aren't enough for you, move to a black neighborhood. See for yourself.
People like me dont want to be around violent criminals, thieves or people who are nuisances. Neither do you. You just won't admit it. The trashiest trailer park in America can't come close to the violence and depravity of any black ghetto.