Not only is this disingenuous, and quite possibly impious, but as a philosopher and a self-professed scholar, he should know that those who make affirmative claims (such as "God exists") are the ones who have the responsibility or proving their case. The skeptic is entirely free to reject any claim that doesn't satisfy her own standards of reason and evidence. If I tell you that the Flying Spaghetti Monster touched me in my no-no place with his noodly appendage, it's up to me to prove the truth of this claim. It's not up to you to disprove it.
But back to atheism being a religion. Well, why don't I just let Bill Maher handle this one? Since many people believe that atheism is a religion, then atheists should get to do all the wacky things the religious get to, right? It's only fair. So, Maher decided he's going to unbaptize Mitt Romney's dead father in law :)
Oh, that remark about Ayn Rand just made my day :)