Let him who boast, boast about the LORD. " Instead tell him how he should feel grateful instead of being arrogant.
Hmmm, he may have an inferiority complex due to something happening in his childhood, either way, be honest and tell him he is being a jerk...but don't neglect what he's got, there are women out there who would kill for a physicaly fit boyfriend. HONESTY IS KEY just tell him quietly and calmy so his ego doesn't take a hit. :).
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.