Why look for any "reasonableness" of actions in war?
War is the ultimate expression of human madness. Where else will you find young men TOLD to go out an kill as many of the enemy as possible. That it's a good, loyal, right thing to do?
Most humans are not natural killers. Most have to be conditioned and encouraged to do so - and that goes for all sides in a war, any war. It's a major reason why disgusting racial slurs like Nips, Huns, Towel heads, Wogs, Bolshie, Commie, Boche et al are so widespread in the Military. It de-humanises the enemy. Yet given that men are basically good why be surprised if, in amongst the madness, a man (eg Stigler) finds that he rebels. Even for a short time?
Everyone thought (or chose to) that they were in the right during WWII. Most do in any war. The French certainly thought so during the Revolutionary and Empire wars of the late 1700's and early 1800's.
All that aside
my choice for a fairly typical Luftwaffe fighter pilot would be Heinz Knoke. An ardent believer in Germany and the Nazi Party (as the saviour's of a downtrodden country), Boy Scout and Hitler Youth, called up in October 1939 and who flew most of the war. Only to be injured in a mine explosion in a car in '44 outside a small Czech village.