Theists often ask atheists what sort of evidence they would accept as proof that God exists. I think if all religious folks lived up to their own deeply held values, that would be a true miracle. But there’s little risk of that.
Personally, if I believed that an omniscient, omnipotent and potentially cranky deity was keeping tabs on me all the time, I’d be a lot better behaved. How can a theist expect me to believe in a God when virtually none of them are capable of living as though there was one?