That is not completely true. For example, the narrative on thedonald.win wrt recent rioting is that most protesters are looters and that looters deserve being shot. They seem to be ok with militarized, strong-men police.
Also, "play stupid games, win stupid prizes" is used as a justification for violent policing. "Of course you're gonna get tazed/hit/shot at if you don't comply with orders/resist arrest/insult the officers."
Now, we can argue about how representative thedonald.win is to the entire population (I think a non-negligent part of the population subscribes to those views), but the point is, party affiliation does affect one's position wrt violent policing.