Update: Kurt Vonnegut in his final speech had quite a lot to say about Marx:
I might as well clinch my reputation as a world-class nutcase by saying something good about Karl Marx, commonly believed in this country, and surely in Indian-no-place [Indianapolis], to have been one of the most evil people who ever lived.
He did invent Communism, which we have long been taught to hate, because we are so in love with Capitalism, which is what we call the casinos on Wall Street.
Communism is what Karl Marx hoped could be an economic scheme for making industrialized nations take good care of people, and especially of children and the old and disabled, as tribes and extended families used to do, before they were dispersed by the Industrial Revolution (Vonnegut, K. 2008. Armageddon in Retrospect, p. 23).