Ethno-Nationalism was simply Nationalism. There was no such thing as a "Ethno-State" prior to recent times, the Jews renamed "Nation-State" to "Ethno-State" to imply that it was separate from Nationalism, that Civnattery was true Nationalism, and Ethno-states were a somewhat historically rare/ controversial concept. Although, even if you had a Nation-State for your Nation, that didn't necessarily mean that individuals of other nations couldn't assimilate into your Nation. But that's proper genetic assimilation into the Nation. It ought to be the Nation's choice as to whether such a thing is allowed and to what degree it is allowed. Prior to Israel, the Jews were considered to be a "Stateless Nation" rather than something that ever properly assimilated.