When everyone did what he wanteted to do in the past Germany ended up as the Holy Roman Empire doomed to be merely a toy for the neighbouring powers.
I fear the same would happen to the european countries if the Eu disintegrates.
The best thing the Eu did was cutting down borders caus this was the whole reason everybody got nuts around the first world war cause every retarded nation wanted to make a bigger version of itself like greater Germany,Hungary,Romania etc etc etc. I am german myself and I think it was totally retarded.