Memes

I think you are missing some necessary historical context to follow along with what they're saying here. Capitalists (through military, CIA, NATO etc) have routinely engaged in mass killings of communists around the world. One specific instance being the murder of 1 million+ people (communists) in Indonesia between 1965-1966 all organized and funded by the US. There's a great book about this called The Jakarta Method: Washington's Anticommunist Crusade and the Mass Murder Program that Shaped Our World that I think everyone who isn't familiar with the incident should read.