You said: "This kind of language is why these threads get flagged. "
But you don't know that, so the claim is projection. As a flagger, you only know why you flagged, but don't know why anyone else flagged. There are many alternative reasons any given story, political or otherwise, could be flagged. People can be engaging in tribalism as their reason for flagging. What's worse: engaging in discussion that is along tribal lines, or hiding discussion for tribal reasons? Which does more damage to this community?
Since we can't know why a given story is flagged, a better discussion might be: given that many people in the community want to discuss a topic despite a flag, how can HN better support those community members?
We have one signal: a low-fidelity binary flag we can't know the reason for and how many people voted for it; and another signal: the discussion, a high fidelity signal we can look into and see all kinds of useful discourse. So clearly your claim that these topics are not wanted on HN is false, given the community involvement in these topics.
Maybe there is some tribalism, but generally it's not at all like reddit, and I find those discussion insightful. Maybe you don't, and that's fine. But why does that mean you get veto over the many people who want to have those discussions here?
Why can't we support those discussions, that again people here want to have, in a way that doesn't involve treating the topic as verboten? Because you keep saying these topics miss the HN mark, yet the community is continually interested in these topics.
So maybe it's the guidelines miss the mark and need updating to meet the community where it's at.