This is a much more complex phillosophical point than I first understood it to be. It is 03.45AM here and I'm a little tired so please bear with me.
I think it is to do with the act of rememberance. We remind ourseles of past wars in an effort to both honour the dead and prevent further, future war.
I will use the BoB flypast again as I am familiar with it. You have a Spitfire, a Hurricane and a Lancaster, the three most famous British fighting 'planes. I believe the purpose of using these three aircraft is in essence publicity seeking. They are famous aircraft and in themselves attract attention, this attention can then be targeted to educate about the BoB and WW2 in general. In addition those who fought and sacrificed for our freedem can remember those far off days when they were young and each time they awoke could be the last time. The BoB flypast also evokes the "spirit" of the British Isles in the summer of 1940 when we stood alone against an occupied Europe. In a way it says "Throw what you like at us and we'll still be standing".
I feel that it is possible that the Israeli airforce is saying something similar with a flypast of modern jets at auschwitz. Until Hitler the only people who had come close to wiping out the European Jews were Isabella and Ferdinand in Spain during the 14th Century. Compared to Hitler that pair were boy scouts. If the Israelies are saying "You can kill most of us but 60 years late look where we are" I think thy have a right to.
Just the ramblings of a tired person, I hope it makes some sense.
Will