You can't prove there is a god, and I can't prove there isn't. What I can prove though is that hypocrisy would seem to be the order of the day in all religions. Just look at the cover ups that have gone on in the Catholic Church regarding child abuse. The rule book in that case is the bible, and if you can't keep to the rules don't join the club. All that seems to happen is that theologians keep reinterpreting the rules, whether in the bible of the Koran, and in the end most folks just stick to the rules that suit them.
Giok