No one joins Christianity. It's not a club, or an organization, or even a religion. It's a relationship between the One true God and man.
That relationship was severed when man first disobeyed God and it's restored the moment man believes Jesus of Nazareth is God in the flesh who gave His life to free us from the bondage of sin and asks Jesus to save him from the penalty due him for that disobedience. Christianity is a love story written in blood on a cross of wood. Yes, God loves us so much He will not violate our freedom to choose, even if that choice is to our own detriment.
If you choose to live for eternity apart from God then He will grant that desire, just as He will grant my desire to spend eternity with 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.