Ok, this may sound really stupid at first but there are 2 great films which sum up God and religion for me. Beneath The Planet of the Apes - where holocaust survivors end up worshipping a holy bomb because of hearsay and chinese whispers passed down from generation to generation. Monty Pythons Life Of Brian - the best line of all time is when Brian speaks to the religious zealots below his balcony and says "You don't need anyone to tell you what to do, you've all got to work it out for yourselves" brilliant stuff and so simple too.