Marginalization/shunning doesn’t prevent this.

It is literally the only thing that works against Nazis/fascists besides violence. This is just the "paradox of tolerance" being taken too far. These people do not deserve to have their hateful ideology legitimized. It needs to be made known that there is no place in modern society for them, so long as they choose to support or espouse that ideology.

I am all for acceptance. Which is exactly why I understand that these people are not compatible with a society that is accepting.