I can see both sides on this one I think?
Out of curiosity, would you feel differently about this if it had been a print newsletter or physical book publisher that was printing Nazi propaganda that got shutdown because they refused to stop printing Nazi propaganda?
If so, what's the substantive difference? If not, are you affirming banning people from publishing books based on ideological grounds?
Obviously banning books is bad, but obviously Nazis are bad, and that's a hard square to circle.
Printing Nazi propaganda isn't illegal in the US.
And I realize this isn't in the US, obviously. But I think that the idea that the government shouldn't be able to ban people from saying things, or compel them to say things, is so baked into the American zeitgeist (of which I am a member), that it feels wrong in a fundamental moral sense when it happens.
It's the old, "I don't agree with anything that man says, but I'll defend to the death his right to say it," thing.