Any tech + political thread is auto flagged + deleted because the mods don't want to manage flame wars.
So it's completely by design and also literally because they are lazy and don't want to fix anything.
Pretty simple actually. Not that deep. Just pure laziness
HN is trying to be a place for thoughtful discussion, mostly about tech or tech-adjacent topics. Flame wars about political things are about the opposite of that.
Now, when tech intersects politics, then it's on a razor edge - is it going to turn into a tech discussion, or a political flame war? There is a tendency (mostly from readers rather than admins) to presume it's going to turn into a flame war and flag it to death.
Again, that's not laziness. That's trying to maintain a site where sane discussions can happen.
Trolls won
I feel like letting discussions devolve into a flame war is the morally superior choice then to simply ignore it. When there is a genocide, we as humans are supposed to do everything in our power to try to stop it, no matter how performative and futile those actions actually are.
If you want to "stop genocide" get off of HN and do something practical. What? I don't know. Or accept that there is absolutely nothing you can do about it and don't waste your time in yet another Hacker News hell-spiral of political nonsense, pretending like it matters. It never will.