I do think it's important to note, as you do, that Germany has a very solid post-war history of great cooperation with the U.S.
It's unfortunate that Schroeder's desperation to get re-elected has led him down his current path. He was basically willing to sell his country out in order to protect his political future, and the reverberations of that decision have affected people like you, and that's sad.
Here's hoping that there's a new government in Germany soon, even a more rational SDP government would be a vast improvement, and once that happens I expect relations will improve greatly.