"Seriously?" was not my argument. My argument was that there have been far worse atrocities in communist countries than the problems described in the US. I didn't really think I needed to be specific, because it's common knowledge... but if you insist, here's your history lesson: https://en.wikipedia.org/wiki/Mass_killings_under_Communist_...
It does not necessarily follow that commnist/marxist ideology on its own was the cause of the atrocities. In fact, i'd say there's a good argument that they were ultimately caused by ignorant power-seekers misapplying the ideology for their own benefit.