Ignore him, act like you don't honestly care. The way I see it is, it wasn't meant to be between them; and he's still living in the past. Trying desperately to find someone to blame, and he landed his finger on you, because you are closest to her.
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.