If?
I still maintain that it's safer to assume that all cops are goons and be pleasantly surprised than to assume that all cops are nice guys and find out the hard way that I'm wrong.
I'm sure cops do the same thing with everyone they meet, too.
Sorry you feel that way. Why would you have occasion to have interactions with law enforcement, and then formulate such a low opinion of all officers?
I know why cops think that way. And it is with good reason.