I have never met a libertarian who didn't vocally disapprove of police violence. I mean, it's THE core principle they ALL hold, no initiation of violence. I would love to met a libertarian who ignored or minimized state violence. Just to hear them justify it.
most "libertarians" are just Republicans too embarrassed to admit it. The South Park guys are the exception, and even they have had plenty of gang o' pedos (GOP) aligned views, such as "climate change is a hoax because I thought about it for ten seconds and it seemed fake".
That's a common statement, but untrue. And the Southpark guys apologized to Gore for what they said about climate change. 20 years ago.