The EU is too large and diverse to be a viable country. Inevitably, it ends up ruled by a technocratic elite (because there's no way democracy can work with 500 million people and 28 cultures) and with recurring crises (because there's no economic policy that works for all countries, and no means to agree on any fixes).

You seem wilfully ignorant: you focus on my non-essential point about the flag, for example, and ignore the obvious issues with the EU (which a cursory Google search will help you find).

Stiglitz identified the fundamental crossroads: the only fix for the Eurozone's monetary problems is fiscal union. Thing is, if that happens, there'll be further crises and further demands for integration. None of this will make the Germans and Greeks resent each other less, and the endgame is a resurgence of nationalism.

I'm a capitalist, not a nationalist, and it's very obvious to me that the EU should have remained a trade union of independent countries.

>single foreign policy be a bad idea in any way?

Because you might disagree with it? How can you be so narrow-minded to not even fathom people having different fundamental beliefs? Why don't Israel and Palestine just merge into one country called Unicornia? Why don't all people just separate religious beliefs from government, or conversely, why don't we all just switch to the correct(tm) religion?

One country may not want to support terrorists while another wants to support them because they are 'freedom fighters', how do you propose they operate under the same foreign policy?