Hmm. I wouldn't say Nazi sympathisers... I'd rather say extreme libertarians. They see every kind of speech as acceptable, no matter how hard history has proven this kind of speech to lead to ultimate desaster and suffering.
Anyway, HN has always tended to the libertarian side of things, doesn't surprise me that there is also quite a bunch of radical libertarians. Thankfully, there also seem to be some Antifas in here, if only to provide some counterweight...
No, far from it. I did not equate them (and I never would), but there are a number of libertarians who believe that fascism is a valid part of the political spectrum and covered by free speech.
That does not neccessarily mean that they support fascism itself - in fact, I have yet to see a libertarian who does not say that he/she despises fascism.