Also, every single major Nazi on the show (Klink / Schultz / Burkhalter / Hochstetter) was played by a Jew. So was LeBeau, who was a concentration camp survivor no less.

I can only infer that they mythologized WWII less than we do, and the opportunity to parody Nazis was acceptable to them.

To the show's credit, it was kind of progressive when it comes to race. Besides pulling the trick of making the black man the technical genius who doesn't give orders (like on "Mission: Impossible"), he was treated like "just one of the guys" by the POWs. The only people who ever treated Kinchloe as inferior for being black were the Germans. The show even dared to make some gentle jokes about race, like last night's episode where the POWs had to convince a Russian pilot that they weren't German spies ("come on, do I look like a German?").