Greetings,
Trigger warning - here's a sutta that opposes the notion of "open borders" by advocating the righteousness of providing protection for those within one's jurisdiction,
including the army (and I guess, by extension, police, and "border patrol" groups like ICE, in the US).
AN 3.14 wrote:“It is the Dhamma, bhikkhu,” the Blessed One said. “Here, bhikkhu, a wheel-turning monarch, a righteous king who rules by the Dhamma, relying just on the Dhamma, honoring, respecting, and venerating the Dhamma, taking the Dhamma as his standard, banner, and authority, provides righteous protection, shelter, and guard for the people in his court. Again, a wheel-turning monarch, a righteous king who rules by the Dhamma, relying just on the Dhamma, honoring, respecting, and venerating the Dhamma, taking the Dhamma as his standard, banner, and authority, provides righteous protection, shelter, and guard for his khattiya vassals, his army, brahmins and householders, the people of town and countryside, ascetics and brahmins, and the animals and birds. Having provided such righteous protection, shelter, and guard for all these beings, that wheel-turning monarch, a righteous king who rules by the Dhamma, turns the wheel solely through the Dhamma, a wheel that cannot be turned back by any hostile human being.
Metta,
Paul.
"Whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things."