To review their own sins seems to be the actual tendency in Hollywood these days, probably if we analyze the current world order and the unpopular that has become the first power, we could understand this revisionism.
Movies like "The Good German" touch a little bit a dark episode about the end of "wwII", black & white motion, humid and dark places show us an American army corrupted by misery and dealing with people as objects. This movie is very far away from productions like "Saving Private Ryan" and "Iwo Jima". Wherever you look in this micro universe you can see the worst things of human nature: Greed, lust, contrary to the image of "World Police of Justice". we can see a bunch of really good characters who plays rats fighting for an old cheese, everyone for a different and a selfish reason.
For sure isn't a girly movie, a blockbuster or an action thriller, but at least is a true sight of the human condition, in spite of that ,"The Good German" is a good movie not just because of its excellent cast that includes George Clooney, and Tobey McGuire, it's because is successful to making us feel this imperfect human beings as real persons with a valid ethical code.
A truly son of "Film Noir".