The universe existing as a byproduct of God?

[SteveII]

So then the NT is a description of what contemporary people believed to be true with respects to Jesus' life and claims. Why would they believe it to be true if in fact it was not? Many would be eyewitnesses or had access to eyewitnesses.

That statement could be literally applied to any description of any holy figure of any religion.

Name another religion where this set of facts applies. 

1. Public miracles (big ones - on the scale of resurrections - the kind that prove the existence of God - and backs up claim of begin sent from God). 
2. people believed
3. then people wrote about it.