This type of thing is possibly one of the hardest ethical issues to tackle. On the one hand, I don't support racists and fascists at all. But on the other hand, I recognize the potential damage in carving out these exceptions in free speech. As social mores change, the ideas of "acceptable" free speech may change, and we need to be cognizant of the ways that these exceptions could be abused long term. Otherwise, we're just setting up future generations for a collapse of the concept of freedom of speech.

I think the answer to solving hate and bigotry goes much, much deeper than preventing people from speaking their hateful and bigoted views. All that's going to do is sweep the problem under the rug, and eventually that problem will come back out some orders of magnitude worse. Perhaps we could do things like make it illegal to teach kids hate and bigotry? But then you've got the entirety of America mad at you because you're "telling people how to raise their kids". Mere advocacy against bullying and hate doesn't really seem to be working.

I think we'll see better gains in this area when we stop trying to find the first thing we can to "blame" these mass shooting on, and arguing endlessly about what that cause is (guns, video games, unrestricted freedom of speech, etc). We need to dig deep. I think if we understood more on the topic of mental health, we'd have a better chance at understanding these situations.