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.
Tolerance is a bad word to start with. We tolerate pain or drugs. It already frames the human relation.
What do people want who oppose tolerance? On a human level, what do they miss?