How can a former Christian / current atheist start believing in God and Jesus again?

Read John 3:16-19 and read Romans 7. The Word of God must be the first thing you desire (The Milk of the Word) 1 Peter 2:1-3 says, Therefore, laying aside all malice, all deceit, hypocrisy, envy, and all evil speaking, 2) as newborn babies (Born Again), desire the pure milk of The Word that you may grow thereby. 3) if indeed you have tasted that the Lord is gracious.

It's not based on what you think, or the world think, but "Thus says The Lord". Read also 1 Corinthians 1, and that will start you off. Get into a Bible (The Word of God) teaching Church and you will grow thereby the teachings of the Truth of The Gospel.

I wish you all of God's blessings, and know that God do not change (Malachi 3:6), we do with all the false doctrine that is out there in the world today!

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.