While that part is much televised, I can't say that I've ever seen an officer do any of that. I HAVE seen police perform a core function of keeping the peace between individuals on more then one occasion.
You understand that this is pretty much nothing but anecdotal evidence, right? Maybe ask a minority or precarious workers how they see the cops. The peace police keep is mostly a fiction.
but besides stopping strikes these all seem like things your neighborhood "us vs them" group might do.
Not if the militia is delegated by the community. The community wont order its' militia by consensus to beat up part of the community.
Point being, by and large community policing is a standard function of society and I think it's the standard function of police EXCEPT perhaps in large metros where police are enforcers outside their own neighborhoods.
That's not the role modern police took in a historical context. It has been created to maintain private property relations and that still is its' core function.