“Stauffenberg pointed the way: if your obedience requires you to do criminal, unhuman things, you are no longer bound by your oath. A soldier’s final benchmark must always, in the last instance, be his conscience, not his orders.” That’s what Jan Techau, a friend of mine with a special vantage on this matter (more about Stauffenberg in a minute), told me when I asked him what he thought about a controversy now raging in the United States.