Zeitgeist is dead on with facts and evidence but it's a little opinionated, one sided and they seem to think technology will save the world. I found Zeitgeist 2 and 3 to be better.
Amazing movie I have 30 Documentaries on similar topics and Zeitgeist is defiantly the best.
Other must see eye opening documentaries based on America.

'Loose change final cut' is a more in depth analysis of the 911 attacks,

'farenheight 911' is also an eye opener and has good info on the war following 911,

'Earthlings' is amazing if you want to know about food, also

'food matters', 'food inc' and 'future of food' are good food movies but similar.

'bowling for columbine' is very funny but sad.

'flow for the love of water' is good on water and third world countries.

God can't be proven to exist but can't be proven to not exist either. No Religion is proven to be real not even science it is all based on theory and faith. The TRUTH is based on faith and PROOF is based on evidence.
The Bible was not written by God it was written by man. I believe in god but I do not believe in the bible. The chances of us being alive in the first place is almost zero so its hard to believe we are here by accident. It is up to you to decide what you believe in