“Social Democracy objectively represents the moderate wing of Fascism.” - J. V. Stalin

“Women hold up half of the sky.” - Mao Zedong (though a more or less common saying attributed to many)

“Civilize the mind but make savage the body” - Mao Zedong

“Socialism or barbarism.” - K. Kautsky

“Poor countries aren’t underdeveloped, they are overexploited.” - Prof. Dr. M. Parenti.

“Who has been saved by the United States?” - Fidel Castro

“We have no compassion and we ask no compassion from you. When our turn comes, we shall not make excuses for the terror.” - Dr. K. Marx

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But i also like more jokey ones ;

“The United States is also a one-party state but, with typical American extravagance, they have two of them.” - Julius Nyerere

“Trotsky has sent in a silly letter. We shall neither print it nor reply to him.” - V. I. Lenin

“Stalin shouldn’t have stopped at Berlin.” - unknown

“If you don’t steal from your boss, you’re stealing from your family.” - unknown

“It’s [date] and Stalin saved the world from fascism” - unknown