If Jesus was reborn then why didn't it stay here, so it could actually heal real humans and not just imaginary people?

Because when you make it through a death penalty alive and the Romans don't know it, the last thing you want to do is hang around. If caught they'd probably chop his head off, and there's no chance to get through that alive. There is a difference between resurrection and resuscitation.

And Jesus certainly was not the first person to survive crucifixion. Some survived 3 days on a cross. Jesus was only on it for 3 to 6 hours.

It is unheard of to die that quickly.

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.