Personally, I think that the discussion around this will evolve as the news spreads, but I agree with Robert on this one. Sure, X/Twitter has become a less welcoming place than before, but shutting out a significant portion of your community without seeking their input first isn't a sensible move for such a foundational open source project.
Nah, I think I'm cool if Debian doesn't respect the input of Nazi sympathisers.
For one, it's has classic vibe "if you want to keep the nazis out, you're the one who's exclusionary".
But also, how is refusing to engage on a platform "shutting out a significant portion of [the] community"? That sounds backwards to me. Blocking people from engaging with Debian on its own platforms would be shutting them out. The implication in the article is that Debian is obligated to be unconditionally present on every social platform its users might be on.
The other twist is, unlike Xitter, you don't have to create an account on Mastodon to be able to read their feed. You can access it like any other website. So nobody is getting shut out. They're just posting elsewhere, where anyone can read it.