People make generalizations about HN based on what they see, but they see what they notice and are far more likely to notice what they dislike and weight it more heavily (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...). Basically that means your image of HN is likely to fill out as an inverse image of your own views. In other words, HN will seem to be full of your enemies. That explains why the other side sees the forum as being made up of their enemies.
Everyone here needs to accept—because it's reality—that the forum is simply divided on divisive topics. It's divided roughly the way that society at large is divided in the many countries whose citizens participate here. No doubt there is some skew (because of factors like education and class), but with the exception of a small number of issues like, say, software patents, it's likely not a major skew. Perceptions of major skew on HN are overwhelmingly rooted in cognitive bias, which explains why they're so contradictory and all over the place.
One reason this is so important is that when someone perceives HN as being dominated by enemies, they are much more likely to go into battle mode. If instead you perceive it as being a more-or-less representative sample of the world, that's still rough—the world is not as we would like it to be—but there's at least a greater possibility of openness. I wrote more about this here, if anyone's interested: https://news.ycombinator.com/item?id=23308098.
