No, I don't think that is true, but then I am a white person who has never been harassed or arrested by the cops so it's likely that my opinion doesn't count for much.
I see the problem with America's cop shops as this: They are almost all organized to parallel military hierarchy. Many LEOs are former military. Police academies may teach "protect and serve" stuff, but in real life cops adopt the "us versus them" mentality that armed service members are taught beginning in basic training. That's a good attitude for soldiers who defend our nation. It absolutely sucks for officers charged with protecting civilian citizens. When you walk out the doors of your cop shop and get into your patrol car, and are conditioned to see everyone as the enemy, how can you react in a less than lethal way to dangerous situations?
Let's re-do that.