there is plenty of evidence to support the Big Bang theory, so much so that it is exactly that a scientific theory.(although I doubt you can comprehend what that means)um im gonna get back onto topic. " prove there's a God ." lol thats easy. and lemme make a correction, its not "A God, its THE God "
anyway, " Prove there's the God? " Easy! prove there was a big bang! XD
The evidence ranges from the observed expansion of the universe to the Cosmic Background radiation which was hypothesized decades ago and only recently proven to exist
Of course one would have to accept scientific fact over bronze age mythology and we both know in your case science loses out.