And then all you have to do is define "everyone who disagrees with me is a nazi" and you've got not only full-blown censorship but also the moral high-ground!

I know, I know for the sake of appearances we don't define everyone who disagrees with us as a nazi, that would be too obvious (although we still do alot).

We describe the broad spectrum of perfectly main-stream, otherwise unremarkable views (but that disagree with us) as "nazi supporters", dog-whistlers etc.

Too easy.