>Auschwitz wasn't inevitable even in Germany, much less other "nation states."
Few things in social life are inevitable, but consider this - the good things you've mentioned that some nation-states provide, like social benefits, do depend on notions of citizenship, which depend on notions of exclusion. The Scandinavian welfare state, as admirable as it is, couldn't survive a regime of open borders. Nor could even our very minimal welfare state in the U.S. survive free traffic across the Rio Grande. It makes me uncomfortable to confront these sorts of facts, but they're real. What do you make of them?
Doug