It can take years to get over something like that. I think around 4 is what is considered normal. It will probably take at least 1 to be back to a normal state.
You just should be supportive and tell them that it's okay to grieve. You can't help them move past that, it's personal. You can let them work through their grief and just concentrate on being supportive.
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.