If he's an adult, than tell him to stop or he will be kicked out. If he's a minor, than take the salt away from him. You are the house owner, YOU have full control here.?
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.