the core flaw in leftism is that it rejects the concept of a free market of ideas. some ideas are allowed, others are forbidden, it's more of a command economy of ideas. if you refuse to debate forbidden ideas then you lose the ability to win arguments against those who espouse them. the free market of ideas corrects itself by expelling leftist ideas, or in this case they self-deport from the free market of ideas because they reject the notion that their ideas should have to compete freely with others
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