It does take two to fight! I expect your dad loves you and is upset (angry?) when you disagree with him. Try to see his point of view sometimes, even if you don't agree.
You are both still grieving for your mother, no doubt, and could be taking more comfort in each other. You could be expressing this grief with anger. I strongly suggest that one or both of you have some bereavement counselling; most counsellors won't even start until at least a year after the loss.
Stop fighting him!
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.