Pete Seeger, like many leftists of the 30s and 40s were not communists. They were Stalinists. Imagine a singer being praised who was a big fan of Adolf Hitler. Stalin and Mao both outdid him in the genocide business.
I always HATE finding out about singers that I think are wonderful being GD commie Marxists.
Used to like Burl Ives a lot until I found out what a dope he was politically.