Not all cops are jerks. They're people like everyone else. It's true that some get off on a power trip. It's the few that make it look bad for all.
I was walking a rail trail on a warm moonlit evening and was handcuffed, and accused of being a drug trafficker because I have dark skin, long hair, earrings and tattoos. I was released after they found no drugs on me or in my car. The cop who handcuffed me apologized and told me that the trail I was walking on was used by drug traffickers in that area. He never raised his voice, or acted like a jerk in any way. In fact he was very professional and polite. I was glad he was out doing his job. While it's true I was a little miffed about being racially profiled I had to admit to myself that I did kinda fit the description of a drug trafficker in that area. I'm American Indian and I have been mistaken for many different dark skin races.