Absolutely. I support, in as many cases as possible, the subordination of the outdated nation-state concept to international federations and the end of ridiculous notions of national sovereignty.
Why do you want to replace national soverignty with the surely MORE ridiculous concept of European nationalism?
As an American you might not be aware of it, but that's what the EU is. It's no less xenophobic, history-romanticizing or war-mongering than the old European nations. The main difference is that it has no democratic or historical legitimacy whatsoever and has severely flawed institutions.
How exactly has the EU been war-mongering?
One of the EU goals is to become a respected world player by military intervention. Europhiles are always lamenting the lack of war (the Americans intervened in Bosnia just because we lacked military muscles, it was our backyard, blabla).
The European army that we are moving towards is likely to be used for things like those neo-colonialist adventures in Africa that the French are always so keen about.
Of course, I'm not claiming that this is all THAT war-mongering. Then again, neither are the independent European nations of today.