Is it that surprising? As a longtime member, this seems perfectly consistent with the general bent of the website. Collectively, HN has long been extremely comfortable with authoritarianism and far right ideologies, as long as those opinions are expressed in a framing that conveys intellectualism and "civility". Those same expectations are weaponized to drive out dissenting voices, which creates a positive[0] feedback loop.
Honestly, if anything, I'm surprised that this comment thread is (reasonably) lucid, because that's not how a lot of other comment threads recently on similar issues have gone.
[0] In the literal (non-normative) sense: a positive feedback loop is one which amplifies the effects, whether or not the end effects are "good" or "bad".