I will pose to you a simple statement of truth. Everything we know or sense (see, hear, taste, feel, etc) is not prooved to be the true reality we have come to love. Imagine you woke up one morning and you were in a place with clouds and winged people flying around, most people would associate their surroundings with heaven. However it is just as likely that this is just an extremely elaporate hoax made to trick or test you. Same goes for the reality we know, who's to say what we know as "Earth" isn't just some virtual world. This is the same theory the movie "The Matrix" uses as part of it's plot.
We can apply this idea that the world might be a hoax to higher ideas like religious debates. With this in mind no one now should have 100% proof for the existance of god because there is always the possiblity that the bible that they read all that from was made as a hoax along with everything else in our reality.