As it is, like any other profession, the police service has to take what it gets. And the nature of the work is such that a lot of bullies, a lot of racists, a lot of right wing authoritarians will be drawn to it and want to get stuck in. Also- as someone said on some thread I was reading- you work in the gutter you get tainted by it. Also there's the thing they call canteen culture- cynical, mucky, intensely tribal.
I suppose what I'm saying is, "What can you expect?"