> A country may vet entrants according to any criteria it chooses…
Sure. But said country may have set rules for itself, like the First Amendment, that limit what's permissible beyond what international law and sovereignty alone permit.
(To extend the house analogy, you may not actually be able to "enforce any limits I wish unto who may enter my house". It is, for example, generally unlawful for you to evict your minor child. If you rent out a room, that tenant has rights you can't violate, too. You can't keep out a cop with a valid warrant, either.)
Sure. But said country may have set rules for itself, like the First Amendment, that limit what's permissible beyond what international law and sovereignty alone permit.
(To extend the house analogy, you may not actually be able to "enforce any limits I wish unto who may enter my house". It is, for example, generally unlawful for you to evict your minor child. If you rent out a room, that tenant has rights you can't violate, too. You can't keep out a cop with a valid warrant, either.)