big bang theory has made predictions that have been found to be correct, i.e. cosmic background radiation. its been part refuted, reanalysed and restated to correct errors. its a solid working theory. multiverse isnt a theory, more an interpretation of quantum theory, and certainly not considered a fact. TV and popular science like it because of the implications for parallel universe. i perfer the Copenhagen interpretation with cats in a dead/not-dead state. either way the underlying quantum theory has led to discoveries.
religion on the other hand has led to no discovery or proof of anything.
The Big Bang may have been from divine intervention though, as normally a huge explosion from nothing usually requires a spark. The Universe does appear quite large when you see pictures of the Hubble telescope.