Yeah, that section is bad.

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.