Beyond Belief?

Looking at the website for this documentary and the trailer for the movie, I'm once again amazed that atheists have decided that it doesn't take an act of faith to believe in their hypothesis that God does not exist. It would seem that efforts like this are proof in themselves that a suspension of belief is required to not believe in God. Atheism is something you have to be convinced of, not something that is a natural state of being. If it were not so, why do atheists proselytize as much as they do?