The most important one is the disapproval of parasites in society. For communism, the parasites are the capitalists.

Karl marx's life was one of parasitism, so I guess he knows the subject well, unlike his understanding of the human being.

Free exchange (capitalism) is not parasitism, it's voluntary exchange.

And I also disapprove any person that profits from the work of others.

This is a natural dynamic found throughout the natural world, not just humans.
'Disapproving' about natural systems, says a lot....