You're just a grass with a badge :)

I have a feeling that police are generally highly religious.

:) Ha !

I have no clue as the to prevalence of superstitious belief in the police, but you do hit on a very real issue.

There is, undeniably, a cultural divide between the police and sections of society. To imagine the police draw on all areas of society uniformly to populate it's ranks would be silly.

There is something (beyond payment) that informs people to make the corralling of their fellow man to the rule of law their job in life, to deny this is not an expression of their character would be difficult to defend.

Simply put the police will always be innately more hostile towards certain groups of people, regardless of their training.