Proof? Of course not! But it's as good as the "proof" offered by other religions. The fact is that there is no proof that any kind of god actually exists -- not even the supposed "holy books", which were all written and compiled by humans. Any person has the right to believe in any religion, but considering there is no proof of the religion's validity, that person has no right morally to try and force that religion on others through the government or legal procedures. And in the United States, such action is also constitutionally prohibited.