Earlier quoted context omitted.
Yes, we let literal Nazis March in Skokie. Tolerance except for those one thinks are immoral beyond reason is gives just as much license for, say, an anti-abortion activists who genuinely sees abortion as murder to remove people who support abortion.
Indeed. And that is the conundrum, is it not? We absolutely cannot let evil stand when we identify evil. Otherwise, it marches in and kills many. On the other hand, if we misidentify evil, then innocent people die. I'm not saying I have a solution. But the idea that "tolerance will save us all" is hopelessly naive. The sad fact is, a large number of people are systematically intolerant.
No, you let evil speech stand. And you call it out as evil, and make clear reasoned arguments why it is evil. That is the solution.
Only when that evil speech turns into action does the society step in.
Resorting to censorship only demonstrates weakness and an inability or unwillingness to argue against evil. This leads to people questioning whether the target of censorship really is evil at all.