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.
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.