This is a hideous tone that will do nothing but antagonize proud citizens and sour voters on the idea of generosity.

Thoughtful discourse is predicated first on basic respect.

Psst, the societal opinion on this has shifted.

We shouldn’t feel bad about protecting ourselves.

>how hard it is to get a green card

It should be hard.

Great comeback, except you completely ignore the point (its purpose is not meant to be a backdoor) and attack him for... being an American?

Instead of telling everyone else to check their privilege, maybe check your expectations. The world doesn't owe anyone anything. Claiming your desires are everyone else's problem is a deeply self-centered way to view the world.

Everybody is born with natural citizenship.