Following the changing of the guard after the end of Germany's red/green coalition, a fundamental shift in attitude has gradually taken place. Europe today is no longer seen as the key project in German politics in which people are willing to invest an essential part of their political capital – and thus of their own future. Rather, 20 years after the fall of the Berlin wall, the reunited Germany is beginning to realise that it can also act alone. The problem, of course, is that this is a huge misapprehension.
This is the basic reason for supporting the EU. If not Germany, it would be France, or Russia.