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.
This gets abused a lot by people who claim agency over what is intolerance and what isn’t. It would seem an easy and straightforward enough distinction but in reality there seems to be a lot of wiggle room.