I generally agree with your appraisal here, but it is worth it to note that although those sorts of comments are usually pushed to the bottom of the discussion, they are almost always there on every thread where these sorts of issues are raised. I don't think it's a stretch to assume that a significant portion of the tech worlds holds those sorts of beliefs; there are probably even more people who would post things like that, but don't because they know they'll just get downvoted.

Sure: the community is divided, as is society in general. That's the accurate way to frame this. What's not so accurate are grand claims about HN being massively one way or the other, which people make all the time as a rhetorical device.