The company I work for recently opened a plant in Germany, and we had employees in our facility to train. They were here in the US for several months and we got to know them very well, and it did come up. Remember, for the most part, the vast majority of German people were not full Nazi fanatics. Hitler, with all his obvious faults, was a good politician. He knew how to tell the people what they wanted to hear. After WW One, the German economy was a mess, mass unemployment, very similar to the US during the Depression. Hitler offered the people a way out. He also offered them something to blame their problems on, the Jewish people. Also remember, in the 30's and 40's, people did not have access to as much information as they do today. No internet, no CNN, CSPAN, anything like that. The news they got was what the ruling powers wanted them to get. The German people I talked to are somewhat ashamed of the crimes committed during the war, but they also want people to realize that they did not personally committ them. They are a proud people and proud of their country and history. They do not deny the past, they do not like to talk about it. The majority of German soliders were regular people, not much different from the average American G.I. Quite a few of them were born, educated, or had lived in the US before the war. Not all German soliders worked in the camps. The SS was formed because the average solider could not emotionally deal with orders to kill non-combatants. Some even committed suicide. During the war, soliders on both sides were treated fairly well if caputred. Obviously there are cases when this is not true, but German and American soliders found it easy to identify with each other. They pyshically looked similar, had common religious beliefs, and many spoke the others language or had similar backgrounds.
Now, as for the Japanese, very different story. The Japanese culture at the time was deeply rooted in tradation and honor with a rigidly defined social heirarchy. Americans were protrayed as brutal thugs who would kill surrendering Japanese soliders. It was also considered a great dishonor to surrender in battle, and doing so would bring shame on ones family. Again, yes, sometimes surrendering soliders were shot, but this was not the norm. Also, the Japanese Emporer was not considered a man, he was beheld as a living God. And as anyone knows, when a Army believes God is on their side, it's going to be one hell of a fight. Japanese considered other races sub-human, or beneath them. They did not believe they were treating people inhumanly because they did see them as human. Soliders who surrendered were looked on as cowards with no honor. A great book on how brutal Japans Army was in WWII is "The Rape Of Nan King" The average Japanese was much more brutal then the average German. Japan as a nation has denied the atrocities committed during the war, including genocidal policies and mistreatment of civilians and POW's. They do not care to talk about it and very rarely make apoligies.
Sorry if I got off topic, but I hope I answered in some way.
Military and WWII history buff