A) Europeans clearly desire a strong, centralized government that manages their lives from cradle to grave.
B) The Germans are particularly adept at providing it, wanted or not.
I think this problem already has a built-in answer. Maybe we should have let them do their thing back when.
Who are we kidding anyway? Europeans love to kill each other every generation or so, they used to even have a darkly comic expression "Every generation gets a war!". The post-WW2 decades have been an anomaly, largely imposed by the dichotomy of two more powerful entities on their respective peripheries. That dichotomy no longer exists. Economic woes are only going to get worse, and they're already pointing the fingers at each other. The only winners here will be the Muslim invaders these morons foolishly invited into their lands.