>How is putting cops in prison extra-judicial or cruel and unusual?
It's not, but GP's exact words were (emphasis mine):
>Preferably by ending up in prison, among the general population.
Which I've taken to imply "...so they'd get beaten up by fellow inmates". I'm not sure why he'd bring up that detail other than to imply that.
As for the rest of the comment, I'm not disagreeing with you on those points.