There's more to life than whacking off to porn to get off, but damn if it's not quick, easy, and relatively shame-free. Cheese is much the same way.

It's a pretty standard take on the commie side that stuff like colonialism and American slavery are pretty much the capitalist equivalent of the communist mass deaths, so I think their position is that everyone's a hypocrite who has to support a government committing some kind of mass murder (in the modern day, America's mass murder in this lens is its alliance with Israel). Since Americans won't admit their government's atrocities (even though a lot of them do call out the US, but that's not how they see it), why should they admit the atrocities of the USSR?