Don't conflate or equivocate the two. I recall reading of an incident were Pinkertons sat in the comfort of sniper nests and shot down picketing miners as fast as they could shoot. The sort of thing you hear about in the most oppressive regimes or during periods of colonial rule.

The Bonus Army. Douglas MacArthur and George S. Patton attacked veterans, their wives, and children with tanks and live ammunition. Similar violence occurred against Occupy Wall Street.

Most people don't remember, or were never taught, that Oklahoma was a bastion of socialist thought and movements until it was obliterated.

Bernie Sanders is a modern day Henry A. Wallace and suffered a similar fate.