This article gives a pretty good overview of how we got to this point and the email@example.com comment did a good job from ancient times. It presents a good question, citizenship, for discussion. So, here are some questions:
1. Is there a country in the world that allows people from all other countries to enter without a passport?
2. I have found, in general, that most people don’t even want to discuss questions that don’t support their own position — on every side of the issue. They may talk about this article, just from the title, without even reading it. How do you get people to shift from their dug-in positions to even discuss alternatives?
3. Shrink the question down to your own home. Do you allow anybody to come into your home whenever they want? Do you have locks on your doors? Like it or not, the country is your home. Should you treat both the same?
4. The most racist person I ever met was from Taiwan. He wouldn’t buy anything Japanese. Using racist terms encourage dug-in positions. How is the racist term in the title, “Whiteness,” different from any other racist term?
5. There are probably dozens more questions. The big thing is not to get obsessed on just one.
Every journey starts with the first step. The journey about the very concept of citizenship may take decades, and this article is a good start. Thanks for the links to additional material.