Mort Sahl, Mark Russell, Tom Lehrer, and Tom and Dickie Smothers were leftist propaganda, too.
But still incredibly funny stuff done by exceptional comedians.
I'm suspicious of even propaganda that promotes a point of view I agree with. That Donald Duck cartoon is brilliant, and there were a lot of things about the Third Reich that were ridiculous. Disney was right to ridicule them. Still, the Third Reich, taken as a whole, was not ridiculous. It was demonic. There was a time to laugh, and a time to drop bombs.