Also, even if their side was fighting for the wrong cause, the Germans of WWII had some genuine heroes.
Take Franz Stigler, for instance. He had the opportunity to shoot down a damaged B-17, but decided it was an unfair go and instead escorted it back over the English Channel and out of harm's way.
For more, read:
https://en.wikipedia.org/wiki/Charlie_Brown_and_Franz_Stigler_incident
On the satirical and fictitious side, we have Col. Klink and Sgt. Schultz, who were both played by German-Jewish actors Werner Klemperer and John Banner (from Austria), both of whom got the "heil" out of their homelands and emigrated to the United States, where they both served in the U.S. Army.
Even though Klink was a bungling, cowardly fool and Schultz frequently pretended to "see, hear, and know nutting!", with Klink being from Prussian World War I aristocracy, and Schultz whose toy factory was seized by Germany, with the old political parties being abolished in the dark 1930's, and both of them being in the army with Schultz actually despising the Nazi regime.
Klink's screechy violin playing spoofed the fact that in real life, Klemperer was actually a skilled musician, and his father was a renowned conductor.
One of the worst things that could have happened to the show might have been if they hired actors who were revealed to be full-blooded non-Jewish Germans who had served in the German Army or government during World War II, but it's a good thing that it
didn't happen that way...