FWIW I agree, I just think the only even semi-reasonable argument for granting them such authority would rooted in the supposition that they're at least well-trained, but they don't even have that.
> Their job is to beat the shit out of and terrorize certain people
I know that this isn't actually true, but I fear that having it repeated so often by people with agendas to push will end up making it into a self-fulfilling prophecy.
That's right, or almost right. The training is actually the problem, that's where the indoctrination starts. All you need to do is hear the rhetoric of the Thin Blue Line folks like David Grossman (who is very popular) to know: https://www.youtube.com/watch?v=0VxvixMQPbE. They're being trained on "killing", on "combat", on escalation and self-protection, not enforcement of the law.