Do you really think if someone started a war with an EU country, the EU would come to its rescue? This was nothing more than a monetary arrangement, brokered by power lust, denationalization, and one government.
Why is that bad? Trade and ease of regulations among the European nations is not bad in my view. Eliminating the myriad of currencies is a good thing if there is to be economic growth and free travel across the various boundaries.
I would really hate having to convert my Tennbucks to Texas or Utahbucks every time I traveled on business or vacation.
We don’t know yet if the Euro Union will be a success in the present form but stress like that with Grece will produce change toward a final outcome