>Why would the skin color of those who lived there 1000 years ago be relevant to anything? I don't see many Americans advocating for an expulsion of all non-indians (rightly so).

it's kind of too late to expel non-indians, because there are virtually no indians left.

there's a lesson to be learned from their fate, don't you think?

>Also, when was the last time a nationalist wave led to anything good for anyone? All I can recall is ruin and suffering.

well, a fairly recent example would be Ukraine, which would be a Russian province now if it wasn't for their ethnic - yes, ethnic, not civic - nationalism.