Germany's history is very complicated. Churchill wanted Germany built up as a buffer between the UK and the eastern block, There were millions poured into Germany from America for this reason and they only withdrew their forces from Germany a dozen years ago. That is why we can put up so many refugees- they are all living in the baracks ( quite comfortable) left behind by the US forces.
The prime minister of the Area (Land) where I live, said on TV the baracks are where they are, and the refugees will be installed there, he can't move them. It is an unfair situation. Heidelberg has hundreds as those baracks were the biggest and central. The US built a small town there with a hospital, that was why is wasn't bombed as they planned to live there after the fighting had ceased.
Most Germans are convinced the US won the war, they had an enormous effect on post war Germany which is why Obama feels so keen to keep the EU altogether with Germany at its centre. As my own DH was fed by the Americans in those starvation years, I am thankful to them.
Of course there was a lot of money invested in Germany after the war but the investors knew what they were investing in. If they had thrown that money at Italy, Greece or Poland it would have disappeared without a trace.
Judging as an onlooker I would say that the US has a special relationship with Germany. Obama is a clever man and keeps his cards close to his chest.