What exactly did you think HN was about? HN leans heavily to the left. I think it's best to just observe these types of topics, and only participate in the technical topics.
Hacker news does not skew left. Not right. It's simply not a monoculture and it tends to emphasize data first and foremost. Anything even remotely politically charged will draw out all sorts of arguments.
Which makes sense as it was founded by venture capitalists and is essentially used as a vehicle to promote their ideology.