I'm not trying to shame you; sorry if it had that effect. I post links like that when I imagine it might be helpful to users who are trying to decide (as users always try to decide) if the moderator is being excessive or not.
Banning political discussions is not possible for a bunch of reasons, but the most important one is that it would be bad for curiosity, which is the thing we try to optimize HN for (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...). There are too many intellectually interesting topics with political overlap—and ultimately, some political overlap on virtually every topic.
At the same time, not moderating political discussions is also not an option because that would also be bad for curiosity. So we're in a bit of a tradeoff with constraints on either side and no easy solution. I've written about this a lot in the past: https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so.... If you or anyone reads those explanations and still has a question that I haven't answered yet, I'd like to know what it is.
As for bias, everyone always feels that the mods are biased against their position when we moderate this way (https://hn.algolia.com/?dateRange=all&page=0&prefix=false&so...). I'd never claim we're unbiased—who could?—but the bar for reaching that conclusion needs to be a little higher. I can show you a long, long list of HN commenters complaining bitterly that HN is biased in favor of your positions (i.e. the politics/ideology you happen to favor). Every passionate user feels that the bias runs against their side.
I'd be cautious about assuming things about the "demographic or people who browse and comment here". We don't have that data—no one does—and HN is basically a gigantic projection screen or Rohrschach diagram out of which people draw their own pre-existing positions. (https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que...) I know this because everyone does this, and the universal property their statements have in common is not their conclusions about HN (those are wildly contradictory) but the fact that they always see HN—both mods and community—as opposed to their own view. (One explanation for this is https://hn.algolia.com/?dateRange=all&page=0&prefix=true&sor...)