“Stauffenberg was Bavarian, not Prussian.”
I stand corrected, though it’s true that the center of the German military aristocracy to which he belonged was in Prussia and that was on the verge of extinction in July 1944. So I’m not sure how much he was motivated by humanitarian concerns and how much he cared about preserving the German military aristocracy. Either way he clearly had enough guts for 10 men to attempt a plot like that.
I think your larger point is valid enough for debate; I just think most Bavarians would have a fit at any confusion of themselves with Prussians.