I asked my friend Hans and his Wife one time when she was still alive how they were treated when they immigrated to the USA where they could be neighbors with people who died fighting the Germans.
Both of them said they never experienced any discrimination based on Hans fighting for Germany and were solid American Citizens.
Some just didn't harbor ill feelings realizing war is hell for all sides.
I was adopted out of a German orphanage by an American couple who the husband was in the US Army and was a part of the Normandy invasion and terribly wounded.