Not every country wants cultural diversity. I find it weird as an American as that's sort of the default here but I can understand some cultures wanting strong social and economic cohesion.

The assumption being made of course cultures must only change from external forces and that they cannot change internally. It comes from an ancient caste based world view where people are defined by their birthright and do not change from this, that we know now is foolish to believe in.

A citizen is a citizen. You don't create second class citizen, who can see their rights revoked at any time, whereas the other class never has to fear anything like that. That's basic democracy 101.

It goes against the principles of classical liberalism: rule of law, civil liberties, and limited government. I don't think we should just shrug our shoulders and say that it's fine if some countries want to strip rights from people on the basis of race or economic class.

> Not every country wants

This phrase is problematic and dangerous:

A country doesn't want anything; it's not a person. People use this phrasing to claim some authority (always for what that individual wants, of course) over others who disagree - 'the country wants, and I speak for the country'.

More importantly, humans have fundamental individual rights, including freedom - again, not countries but individuals. The rights are no less because some other people don't like the individual - immunity to the majority's desires almost defines rights in a practical sense; otherwise they aren't generally needed. You can't force people to leave or to do anything else because you don't like them.

It's dangerous because it's often used to violate rights and rationalize cruelties.

Stripping citizenship for a reason that doesn’t involve a crime goes a bit beyond not wanting cultural diversity.

I know the word is used in cases where it’s hyperbole or just not accurate but there in fact people where the term racist is perfectly applicable.

Thinking it's atrocious to take away someone's citizenship just because of where they previously came from is in no way a uniquely American thought. In fact it's shared by most people around the world who have a bit of empathy, compassion, and aren't racist.