Although I found this film incredibly enjoyable I felt that it fell short in its argument because he only proved that religious people have no proof behind any of their claims (besides the quoting bible that the people interviewed have often misinterpreted).

When interviewing people Bill Maher would only tell them that they were misquoting the bible without actually showing what the bible actually says or doesn't say.

If the only goal of this movie was to show fanatically religious people acting stupid then I give him props, but the documentary did a poor job of proving or showing anything else.