> Europeans are notoriously arrogant. It's a mockable combination.

Not a very rigorous economic argument - besides they also don't share an immigration policy, nor a single currency (Denmark)

Not currency! Only Nordic on euro is Finland

Norwegians, Danes, Swedes and Finns all use a different currency. Finns and Sicilians do share a currency though, but all these countries have different immigration policies and regulations. I don't think you really know how the EU works.