I summed it up in my response to them, but essentially they have a confused idea of what Communism even means. It’s perfectly possible for them to have grown up in a Communist nation, but 2 points stick out as confused:

1. They believe Communism structurally depends on “good people not being selfish” without elaborating, and

2. They believe Communism to be about some vague “equality,” despite Marx arguing against said very notion.

It isn’t crazy if you know the first goddamned thing about what he’s talking about. Because then you’d know he doesn’t.

Agreed, but I am sad that they don’t choose to share any of those personal experiences that they claim are vital for understanding communism.

Even if communist revolutions tend to fail for the same reasons most revolutions fail (a need for temporary authoritarian rule followed by fumbling the succession) anything that can help understand how and why something failed is useful.