It's a pattern of behavior that affects a lot of online communities from what I've seen, not just HN, but it's particularly concerning when I see that kind of stance here.
There are a number of writers who I disagree with on an ideological level but whose writings and podcasts I'll read/listen to because of the insight these people can provide - even if often I don't agree with their conclusions. I think it's important to be able to consume opinions that don't match your own and be able to hold them in your head without throwing a fit.