Fascism means diversity of opinions, democracy means everyone is only allowed to have the opinions you want them to have?

Fascists in the original sense, Mussolini, didn't tolerate opposition.

I'm not sure about modern fascists, but US politics does look rather Kayfabe-y to me. Fake opposition, there for the purpose of being an opponent.

Of course then you get all the discourse about what even counts as fascism, and someone brings up that the origin of the word is the Roman "fasces" (bundle of sticks) and how that etymological root points to the concept of "strength through unity" which is also why the Lincoln memorial has Lincoln resting his hands on them[0] and why trade unions often use the "strength through unity" phrasing (and get annoyed/upset by the connection).

[0] https://en.wikipedia.org/wiki/File:Lincoln_Memorial_statue_a...

Democracy is having the laws Americans approve of, because God wrote their Constitution.

I find it hilarious when people who are pro censorship bring up Karl Popper and the Paradox of Tolerance.

You can tell they've never read his work because his conclusion in the end is that you should tolerate intolerance up and until it promotes specific violence.

So total freedom of speech up and until it starts inciting violence. It's basically the same stance the US Constitution has.