A country is not land. A country is a human construct. Usually, a country is situated on land. The Soviet Union is no longer a country, but several other countries now occupy its land.
A country is usually seen as its government. If the government ceases to function, the country effectively no longer exists.
Does that make more sense?
Aren’t most states ethnically associated…? Like… the US and Canada are anomalous. European countries are particularly accepting of other ethnicities but still have a core ethnicity. Asian countries are usually pretty homogenous. I imagine African countries are, too. Latin America, I’m not as sure.
Or am I misunderstanding the definition of ethno-state?