Eh, that seems to be a pretty big leap in logic. Europe doesn't need a unified nationstate, if it has strong institutions that fullfil nationstate-esque functions. We are at a good level of that on economic, monetary and judicial matters. The fiscal issues of the EU are in the process of shaking themselves out.

What we are lacking is effective military cooperation. Even NATO is not very good at this, unless the US is shouldering the majority of the load. The situation is improving slowly, though the continued struggles of the A400m and other defense projects show that we have a long way to go still. OTOH given our strategic position and Russia's continued weakness there is no real rush.