I've watched a lot of forums gain the axe grinders who don't debate, they fight. Over time, it's simply people yelling at straw men.
I don't come hear to get lectured, and that's what most political discussions and articles really are. I come here because of the creative techy vibe and relevance to things to which I can actually make meaningful contributions. I have a dozen other places to read impassioned rants about the issues and hot buttons of the day. I don't respect nor value those sites because they're junk food. Politics is where celebrity gossip meets sports.
I often read hacker news articles and threads from ten years ago and find value. Go find a political argument that old that isn't as quaint as the things we wrote in our high school yearbook.
Keep hacker news focused on what it does well. Don't create division.