Just checked out the first part of it mainly to see what it is about.
From what I saw it is trying to show people how religion is fake and used to control/subdue people in all different societies of the world. They use their followers and their faith in the institution to fulfill the hungering greed of money, power, and world domination. Just about every conflict the world has ever had can be linked in some way to religion, whether it is very obvious or sublte.
The point of them making this movie seems to be to educate people to have somewhat of an understanding of it all; however, none of this stuff is even the slightest bit new to me. I am well educated yet it is a sad situation that most people in the world are not because society keeps us busy with working 40 or more hr/wk jobs, bills to pay, families to take care of, and multimedia entertainment to enjoy in the very little bit of time we have left in our lives.
I may watch the whole thing later because I want to see if it stays on track with what I think it is all about. It may go in a whole different direction than what I think. I can't really think of how the title fits what it is about. The only thing I have thought about is maybe it relates because they are trying to say that since religion is this huge controlling cover up that has been around since the beginning, it plays a large role in what the "zeitgeist" of each time is throughout history. Or maybe it would also cover the zeitgeists of different cultures since different religions and beliefs yeild different ideas and attitudes?