Earlier quoted context omitted.
A bit of a paradox, but a tolerant society does not tolerate intolerance.
It's a logical contradiction. There seems to be some overloading of the word "tolerance".
it would be like saying, as the sibling comment did "a peaceful person would never punch someone in the nose" ... except that a society that aims for peace, and is beset with violent people, is going to have to quell that violence. This might involve reserving the right to punch the punchers.