The HN community doesn't "believe" that—people have different opinions, as on many topics. As evidence you don't need to look any further than the massively upvoted subthread that you replied to. It's at the top of this page because a large slice of the community obviously supports this view. That many others don't agree is evidence that the community is divided, not that it's lined up against you; it's basically a variation of sample bias that makes things feel that way [1].
Would you please review the site guidelines [2]? They include this: "Please don't sneer, including at the rest of the community." One common kind of sneering is this sort of supercilious dismissal of everybody-else-in-the-community and their dumbass "hilarious" opinion—this is an internet genre we need to avoid in order to have real conversation.
If you're posting here, you're as much the community as anyone else is.
I understand what it's like to feel surrounded by enemies/jerks/assholes when you constantly run into comments saying things you strongly disagree with. But it's important to understand that this effect is largely a consequence of the fact that everyone is crammed into one big non-siloed space here—i.e. there's no self-selecting into silos the way other sites do it (follow lists, subscriptions, social graphs, and so on). If you don't understand that, this place will feel much more fractious than it actually is [3], and the consequences of that are pretty stark: one ends up feeling surrounded by demons [4], and tends to retreat to things like defensive sarcasm, putdowns of others, etc.
[1] https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...
[2] https://news.ycombinator.com/newsguidelines.html
[3] https://news.ycombinator.com/item?id=23308098
[4] https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so...