Well, I semi agree with Calliander on this issue. While these people should definitely shut the fuck up, our good ol' Constitution does allow these people to say what they want to say. And you know what, who really cares? I'm old enough to filter garbage like this out of my brain when I hear someone talking about it. If we killed everyone in the world who had a "stupid" or "evil" view about something, then there'd be about 5 people left in the world after all the killing was done. And don't ask me to name those 5 people. My estimate has a 5 person margin of error, so the remaining number of people after the killing might be 10, or more likely zero.
Anyway, people like this shouldn't be killed. They should all be exiled to an island where they'll hopefully kill each other. That way we won't have any of the blood on our hands. And, of course, suffering is always a better punishment than death.
So Speaks The Gatekeeper...So It Shall Be!