I had parents, am white, have a college degree and make a similar income. I don't see the cops as pigs and I think it's silly to believe that the police force changes quickly enough to be the enforcement side of any particular regime. I think it's much more basic and understandable than that.
The police do a dangerous job and over time the losses and realized risks add up until they feel threatened. They respond to the threat in a perfectly human manner; they get aggressive. Control the situation. Drive the situation. So they're more likely now than ever to use the tazer/mace/gun, etc.
The effect of this over time is that we citizens feel threatened. So how do we respond? The same way! With aggression. If you yell at me and don't give me a chance to explain anything, ask what's going on, even process what you're telling me before you arm bar me into the ground and drive your knee into my neck, I'm going to respond in a manner that likely doesn't match what the police want me to do.
This is normal human behavior and escalates as the situation escalates. In the middle of the night, even if you knock and announce loudly that you're the police, if you don't give me time to realize that I just heard a voice saying they were the cops, to get up, put on a robe, tell my wife and daughter to relax it'll be okay, shut the dog in a room, look out the peephole to verify that you actually are the cops, etc., before you knock the door in, throw a flashbang, storm the house with M4s and bright lights, etc. I'm likely to respond angrily and without thought. I'm simply reacting at that point, and it's your (cops) fault, not mine for creating that situation. The only person who would act in a measured and thoughtful manner at that point is the criminal who expected such an encounter.
If there is a societal conflict between the populous and the police, one side must surrender to win, and our traditional view of society in this nation suggests that it should be the cops who back down.