Every country is an ethnostate

No country immediately allows everyone that moves into it all the rights of citizens.

People that are born to citizens are automatically given all the privileges of citizens. Which is privileging based on a particular ancestry.

Ethnostate.

And ethnicities can be formed when a state pops up over a random patch of Earth, from the people descendants of the people who got to be citizens.

After the Shoah/Jewish Holocaust, no country was willing to take all the survivors in.