Even if a rank-and-file police officer is a conservative and a patriot, he is a member of a quasi-military organization that is also unionized: It is therefore run by leftists, and many if not most police chiefs (versus elected county sheriffs) are anti-Second leftists.
The bottom line is that they follow orders, and those orders come from people who are not our friends.
Look at San Jose, and how the mayor and chief used the police to herd Trump supporters into - not away from - violence. (An undercover cop who did not act to help any of those citizens stated in his official report that he saw people running for their lives!)
I get it, and believe it or not, I have no problem with that. It’s a job... and you do what you have to do.
My problem is with the “Preserve and Protect” nonsense and the “Thin Blue Line” BS. Some may have started out with those altruistic goals at heart, but that just ain’t the way the game is played.