Interestingly, Grandpa didn't share any of that hatred of the Germans. He blamed the Nazis, the government, but not the people - in general, be spoke highly of them. Particularly of the German dentist who fixed his teeth, and whose bridgework lasted almost 50 years (try finding work that good in today's times.... )
However, he once told me that after visiting a concentration camp, he had no doubt as to who the good guys were, or why he was overseas.