Wiki - The paradox of tolerance states that if a society is tolerant without limit, its ability to be tolerant is eventually ceased or destroyed by the intolerant. Karl Popper described it as the seemingly self-contradictory idea that in order to maintain a tolerant society, the society must retain the right to be intolerant of intolerance.
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The disagreement is that censorship can be good at all. Censorship, even with the best of intentions has always been a net negative for a society. And there’s no standard for censorship that can withstand simple historical analysis rigor. Censorship is always a powerful group limiting the speech of the populace.