And I was responding by saying that your examples ignore the fact that every single large entity in history was produced through multiculturalism. England at one point had different tribal nations with different cultures and a history of conflict that went back thousands of years. As their technological advances allowed them to travel more easily, their cities became settled by different groups, and their idea of what defines a nation expanded. It's not like Jesus went "all right guys, I'm going to call you English from now on, and I give you this piece of land, England, to call your own".
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