True. It's a mess.

Pedantically that doesn't take away from your point but asserting just for clarity because I see people bring it up a lot:

The infamous Killology lecture isn't taught to the vast majority of law enforcement in the US as I understand it. We certainly didn't receive it (or similar) at my academy.

I've heard it isn't quite as bad as cherry-picked-and-taken-out-of-context-to-malign, but I've personally never watched it, much like I haven't read Mein Kampf; "That seems like a soup sandwich of nasty, so I'm not going to waste my time."