I disagree with this, I've noticed that the countries rising to prominence are quite nationalistic and the ones fading into obscurity are very post-national.

> Europeans and people from other countries around the world are often fiercely in love with their countries.

I would also disagree with this, I think it's profoundly uncool to love your country in many parts of Europe—think the UK and especially Germany.

The Europeans that did actually fiercely love their country that I've met were all Poles or Serbs that were gaudily beating their own drum.

What problems do you think arise from nationalism in it's current form in the US?