Why people not believe in bad times that the good time will also come after bad? if they happy?

It's human nature to be selfish creatures and it's been proven that certain chemicals are released during "sadness" that are very similar to "happiness", therefore people can enjoy the suffering and that's why they wallow in it inside of fighting it off. No one can bring you down unless you allow it. People don't want to blame themselves for being sad, so they pin it on whoever they can.

And God is an easy target because it is a known fact that people believe he is in control of everything.

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.