Bill Maher and Larry Charles take on organized religion, with a worldwide tour confronting those that cling to faith with a certitude that Bill finds more than suspect. Meeting with Jesus at a Bible-themed theme park, he quizzes him about the role of God in suffering. Talking with truckers in a trailer church, he asks them hard questions about their faith.

It all builds into what’s unfortunately a quite polemical conclusion. Sure, the point that doubt should override faith is a compelling (if not surprising) one, but Maher’s shtick runs thin quickly, and he frankly loses his perspective, particularly when his own views are directly challenged by equally intractable interviewees. It’s a half good movie, alas, half as good as it should be.