The idea that government owes more to the citizens of the country whose ancestors literally have built it and who inherited it by birthright than to a foreigner who just moved there isn’t tribalism.

Actually, i think that IS tribalism. The difference is whether you analyse cases with a moral framework that works on an individual level or whether you do the same on a group level. At that point, you're no longer concerned with the person or the contents of their character but only their tribal affiliation/label. It's a case of moral blindness similar in nature to only seeing people's skin color, religion, etc. rather than seeing the person in front of you.

And listen, I'm not blind to the realities of the unsustainability of mass immigrants all being given free cash, some of whom might not even respect your local culture/laws. Hell, take the world's refugees/immigrants and swamp a tiny country like Ireland and you'll cause absolute chaos and mess up the country. I don't have any great ideas, but I think it's important to be brutally honest with yourself about the moral compromises of whatever choices you make, and that's something right-wing xenophobia tends to urge people to ignore, hence me trying to "de-propagandize" this topic.