As a white person, I've never had a bad interaction with the police. At worst they are very authoritative, but never obnoxious.
Hearing about black people getting stopped for jaywalking, "loitering", and just generally yelled at, it's not right. Before the famous Starbucks case, I've never imagined someone could get arrested and handcuffed for using a restaurant's public bathroom (I guess technically for "customers only" but that's a dumb rule anyways).
I get the cops' side too, they deal with a lot of actual dangerous criminals (that maybe "look similar" because they're also black men) who have no morals and try to catch them off guard. That can drain empathy and make every situation tense. But that's no excuse for the blatant disregard of black people's humanity. If you can't approach someone both in control of the situation and respecting their humanity, then you're not qualified to be a cop.