Never met Bader but, probably like most young lads who read Reach for the Sky, he was hero figure to me. Then I heard much about his appalling character and the hero in him rather faded.
Some have said that his attitudes were from another time: I don't buy that. Common decency to your fellows, of whatever rank, is timeless. You don't have to be all 'matey' with everrybody if your 'class perceptions' don't allow, but decency should be a given, in any age. I worked for a short while with Neville Duke for example, a war hero and an absolute gentleman. Maybe he is amongst the exceptions.
I suppose what Bader tells us is that 'war hero' and 'cnut' are not mutually exclusive, perhaps even linked in some manner.