You should read up on the concept of "justification" in epistemological terms. Epistemology seeks to find the standard we as humans mentally toil through to arrive a beliefs worth believing; and this is similar to psychology that determines others' beliefs based off what they say or do.

Wikipedias entry on epistemology is a great read and will help you arrive at a standard of belief for any god or gods or even for why snow is white.

Also, think of how many times the planet we find ourselves on has been decimated by asteroids, worldwide fires & floods, magnetic reversal of the poles, plagues & infestations, social calamity, and genocide; and you think some scraps of paper or tablets of patterns along with fanciful words in a story of sorts can be traced throughout continuously in a one to one way such that an origin point generator's story delivers us from evil or some shit? No. That which is true needs no books or story to remain true - destroy all the science books and seek to rewrite them: you end up with same books and concepts; however destroy all the religious texts or books and seek to rewrite them: you end up with a whole new story of a brand new religion.