Whats the difference between Spirits and Demons?

The difference isn't there because spirits and demons aren't real .

A spirit is a person who has passed on, but has actually gone through The Light and into the Afterlife. There they go through a life review learning process, and after that, are able to come and go between the Afterlife and our physical world. Demons are evil spirits.1 They are the fallen angels who fell with their insurgent leader, Satan (formerly named, Lucifer), into apostasy or perdition.

Though we are not told in Scripture what their precise number is, we do know that their number is one-third of all the original company of angels. They are spirit beings filled with unrighteousness and rebellion against God. They seek to influence human behavior in order to carry out their diabolical plans and desires.

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.