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 is such a stupid perspective because it’s literally just guilt by association. No, sitting down with someone with vile views does not make you endorse, condone, or otherwise suppoer those vile views.