Why should I beleive in a book written over 2000 thousand years ago, based on a man in the sky?

That all they have....>The total of Jesus and Christianity is neatly contained in the "Word-for-Word", 1700+ year old New Testament's four Gospels. What we see today went through the Dark Ages and the Catholic Forgery Mill for a thousand years? Add the plagiarism from the Old Testament and you have the entire basis for Christianity.

No other contemporary literature exists...Nothing!

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.