Obviously we will never agree. I'm sure that had CM or I scythed through an enemy cockpit or 3 with our missile warhead, killing or worse mutilating the crew, we would have both suffered trauma and troubling times later. It may be that it would have 'finished' either or both of us - I don't know as it never happened to me, but I would have hoped I would have been back in my jet to do it again without delay since that is why I took the Queen's Commission . The time to quit is when you join - as one of the guys on my South Cerney course did when he realised he could not face 'bombing babies' and had made the wrong career choice. I respect him for that and think no less of him.
It is how far we take your 'empathy' - 'Take the shot' as M in the current film says - there is no time to think.