Considering the data, one might conclude that the police are a greater danger to the public than are criminals.
Indeed, the trauma from police assault can be worse than from assault by criminals. The public thinks the police are there to protect them. Thus, the emotional and psychological shock from assault by police is greater than the trauma from being mugged because you stupidly wandered into the wrong part of town.
Why are the police so aggressive toward the public?
In part because their ranks attract bullies, sociopaths and psychopaths. Even normal cops are proud of their authority and expect deference. Even cops who are not primed to be set off can turn nasty in a heartbeat.
In part because police are not accountable. The effort decades ago to have civilian police review boards was beat back by “law and order” conservatives.
In part because the police have been militarized by the federal government, equipped with military weapons, and trained to view the public as the enemy.
In part because the Bush/Cheney/Obama regimes have made every American a suspect. The only civil liberty that has any force in the U.S. today is the law against racial discrimination. This law requires that every American citizen be treated as if he were a Muslim terrorist. The Transportation Security Administration rigorously enforces the refusal to discriminate between terrorist and citizen at airports and is now taking its gestapo violations of privacy into every form of travel and congregation: trucking, bus and train travel, sports events, and, without doubt, shopping centers and automobile traffic.