Oh, I've seen that movie. The title set me off at first, In German it's called "Eine Frage der Ehre" (A matter/question of honor - my English fails me right now for a better translation). I really liked it.
The problem is, if you'e fighting a war, you have to rely to some extent on your superiors, and sometimes quick decisions have to be made. There might not always be time, at least not in the mind of the soldiers, to question the orders they've been given. Especially, as you said, as they spend the first months of training learning to follow orders without question.