you don't understand.
that cop was doing his job. you're just not clear on what his job is. these kinds of intimidation tactics are designed to control the herd into submission to authority by setting an example of brutality. it's a mafia tactic.
people need to see this, but they also need to understand that it's not a bad apple and it's not an accident. it's entirely by design, created by a system that sees the populace as a type of domesticated animal that needs to be controlled by brute force.
now, shut up and go buy something.
http://www.youtube.com/watch?v=VkJJXUI_Oq4