If bible, koran, torah and other holy scriptures are wrong this will not prove that there is no God. If there is a God there is no way we can prove his existence if he don't want to. Our civilization is still very young, still many things we cannot explained.
what this guy said, is what i think it is, maybe all religions are wrong but there is a god, to me believing in god
is the most important thing, if you really believe in god you, you don't have to pray for him, he knows what you need, i guess.