I knew a German POW who was held in the US, and stayed after the war. He also hated Hogans Heroes. He was a proud German and couldn't stand the portrayals of the oafish Klink and Schultz.
I guess the show had something for everyone....
/s
He said that the sets on Hogan's Heroes were spot on. Rest of the stuff? Not so much. But the buildings, camp layout, and so forth, were correct.
Someone consulted on that show, that knew what they were talking about. :-)