I don't believe the point was whether the war was worth fighting.
I posted this earlier in the Books Worth Reading topic, but it bears repeating in this context. From Pierre Closterman's The Big Show:
Walter Nowotny was dead. Our adversary in Normandy and in the German skies had died two days before in the hospital at Osnabruck as a result of burns. The Luftwaffe, whose hero he was, would not long survive his death, which was as it were the turning point of the aerial war. That evening in the mess his name was often on our lips. We spoke of him without hatred and without rancour. Each one of us recalled his memories of him, with respect, almost with affection. It was the first time I had heard this note in a conversation in the R.A.F., and it was also the first time I heard, openly expressed, that curious solidarity among fighter pilots which is above all tragedies and all prejudices.
This war had witnessed appalling massacres, towns crushed by bombs, the butchery of Oradour, the ruins of Hamburg. We ourselves had been sickened when our shells exploded in a peaceful village street, mowing down women and children round the German tank we were attacking. In comparison our tussels with Nowotny and his Messerschmitts were something clean, above the fighting on the ground, in the mud and the blood, in the deafening din of the crawling, stinking tanks.
Dog-fights in the sky: silvery midges dancing in graceful abesques - the diaphanous tracery of milky condensation trails - Focke-Wulfs
skimming like toys in the infinite sky. We too, of course, were involved in less noble fighting: that strafing of trains in the grey dawn of winter mornings when you tried not to think of the shrieks of terror, not to see your shells smashing through wood, the windows shivering in fragments, the engine-drivers writhing in the burning jets of steam, all those human beings trapped in the coaches, panic-sticken by the roar of our engines, and the barking of the flak; all those inhuman, immoral jobs we had to do because we were soldiers and because war is war. We could rise above all this to-day by saluting a brave enemy who had just died, by saying that Nowotny belonged to us, that he was part of our world where there were no ideologies, no hatred and no frontiers. This sense of comradeship had nothing to do with patriotism, democracy, Nazism or humanity. All those chaps that evening felt this instinctively, and as for those who shrug their shoulders, they just can't know - they aren't fighter pilots. The conversation had ceased, the beer mugs were empty, the wireless was silent as it was past midnight. Bruce Cole, who was neither poet nor philosopher, let fall these words:
"Whoever first dared paint markings on a plane's wing was a swine!"