Atheism is certainly a religion, look at the fervor and zeal the more radical of them go about trying to force their views and opinions on you. Secular humanism is the same way.. a religion with out the fancy trappings so to speak.
Just saw on twitter Christopher Hitchens died? I hope he saw the Light before he went.
And that is the dirty little secret. They can not "prove" their postion that God does not exist no more than I, as a Christian, can "prove" that he does. Thus, both positions share one thing: it takes a leap of faith to get there.