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.
There is a ban but it doesn't mean the german government goes out of it's way to remove any piece of such material before it even hits the internet.
It's largely post-factum, when the piece is already on the internet and spread elsewhere when the original author of the information is punished.
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.