You are comparing the US soldiers who did their job in the Balkans to genocidal Nazis?
No, I’m not comparing our soldiers to Nazi’s, I’m pointing out the absurdity of your view that there can be no valid reason for any American soldier to stand against an order that stands against his conscience and the Constitution. Such a soldier will have to weigh the risks of punishment and ostracism.
That being said, New had just better get on with his life as best as he can now; he was lucky not to have lost the better part of his youth in a Federal penitentiary!