Marx was also a FLAMING racist. He really hated Blacks and compared them to apes and monkeys at the zoo. There are some extremely embarrassing quotes from his letters about that.
Che Guevara was a racist as well; he detested black Cubans. I remember seeing a young black woman in Chicago wearing a Che sweatshirt; I brought up Che’s past racist rants which he wrote in books. She had no idea; part of the problem with American education.