Not allowing information to exist, regardless of intent or how it's perceived as "good", is an authoritarian act in and of itself. It will only polarize those that feed on it.
It's the "let's burn books" mindset, which is just a bad tactic. Misinformation in the modern(or any) age can't be fought that way. The internet is good at amplifying that which people seek to censor. I hope we can agree this is good for positive ideas, but the mechanism employed doesn't care how "good" you find the idea.
And to be entirely clear: I think the subject matter at hand is abhorrent. Fascism feeds on censorship. It doesn't hurt that side, it helps them control the narrative.
Not a binary thing, no. But who gets to be in charge of that speech? Do you trust them? Do you trust who will follow them in power?
Where I live, I'm vastly outnumbered by people who have vastly different values than me. Their party is in control now. Pretty scary to think they could shut off my voice at whim, or worse.