> The most basic principle in democratic government is that those subject to the monopoly of violence should also have a voice in how that violence is managed.

I'm pretty sure most democracies also have a right to decide who can become a citizen. Forcing a country to give citizenship to enemy combatants would be kinda crazy, regardless of whether or not the territory those combatants operate from is under a military occupation.

Isn't that basically the USA regime's logic for stripping citizenship from people who vote against the regime?

The current USA regime is attempting all sorts of dumb nonsense, but birthright citizenship certainly isn't universal among countries either. I'm not a citizen of the country I was born in.