Americans get taught a weird fictionalized version of their own history where political violence ended at the Civil War, conveniently overlooking anything that might be awkward to explain in the present day. Little things like General MacArthur opening fire on veterans
https://en.wikipedia.org/wiki/Bonus_Army ; MOVE bombings; Tulsa massacre
https://www.theguardian.com/us-news/article/2024/jun/12/tuls... ; the general high levels of violence in the civil rights era; lynching, and so on.
The Pinkerton detective agency has a long history of being the go-to contractors for corporate violence against labour organisers: https://en.wikipedia.org/wiki/Pinkerton_(detective_agency)