The wrong debate is being used. Its damn near impossible to prove that some god in the sky is real, or not real, but those stories and attributes that are assigned to a god that can be proved, or disproven.
For instance, the bible states, god said let there be light, then a few days later he created two great lights.
Impossible, The Sun is our Light producing object, so where did the 'light' come from before the Sun was created.
It also says that the vegetation grew before the Sun was created. Again impossible.
Now, back to the 1st point of there being TWO GREAT LIGHTS. Well we all know the SUN is a great light, but the MOON is not a light at all, it only reflects light (but I can see how people living 1000's of years ago thought the Moon was an actual light back then) .
And that's just the very 1st page, I didn't even mention how impossible the the Noahs Ark story is, or talking animals, or the impossibilities of genetics that are mentioned in the bible, or how about god created Males and Females for just about every animal on earth, but didn't have the omniscience to immediately create eve when creating adam, etc, etc.
Those are things that can be proven, or disproven.