Christianity as such is a word the describes a persons teacher or practice! It designates a relationship. By practice Jesus taught, because he claimed to be the Christ, and there were those that followed his teachings there were Christian long before the term was ever used.
Etymology is a very interesting subject and so is the study of word construction. No doubt the Jews had some term to describe the followers of this man called Jesus who claimed to be the Christ. That word I am sure Jesus heard while he was still alive on this planet.
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.