Okay, I'm going out on a limb here, perhaps playing devil's advocate, or whatever, but then again, maybe not.
HST and everyone on this site knows that the USA is the world's greatest nation. Since the collapse of the USSR, the US has simply been forced into the role of Leading The World into the future, whether it wants to go or not. In our role as The World's Greatest, perhaps Hunter was dismayed in the concept that the photos revealed that our standards of dealing with the enemy were lower than great, progressive, or wise. Just a thought.
The Nazis committed some REALLY horrible attrocities. This is hardly comparable.