Unless I am sadly mistaken, were not the “racist Southern cops” Democrats, and were not the “Chicago cops attacking the “kids” in 1968” run by a Democrat city apparatus. I am not quite sure about the Ford security people, but there might be more to that one also.
So, the question is, how were these right wing acts of violence?
Shows of force by uniformed persons automatically translates to “radical right-wingers” in the minds of leftists. They do not deal with facts, but with fantastical emotions.