Fred, what he has said a number of times [paraphrasing] how can people be so stupid or gullible to believe the stuff the Bible says about Jesus, etc, etc. So he's not saying something about the terrible stuff the Westboro Baptists do or something like that, but about actual belief. That to me is over the line. I may not agree with the folks who worship Mother Earth, but I'd not want Al or any other talk show host bashing those folks for their beliefs. Interestingly, Al also claims to go to an Episcopal church [probably to make his wife happy he doesn't say]. So why would you go to a Christian church if you don't believe in the Christian God, Jesus ?
Your comment : "People who profess their own faith most loudly, insistently and frequently are usually the least tolerant of the differing beliefs of others", works both ways. Not having a faith also is a form of faith, so it can also be said that people who profess their lack of faith most loudly, insistently and frequently are also usually the least tolerant of those who do have some sort of belief.
Faith and Religious beliefs, just as no faith and no religious beliefs, or an Atheist view point, all are very personal and deep seated in a person, where either will be out spoken against the other. Believers aren't alone in that attitude. I'm not saying its right, but its not right for either is my point. I find you'll condemn a outspoken Christian very easily, but I don't remember you ever condemning a Bill Maher type for his/her lack of tolerance. Like it or not, it does work both ways.
I'll give you the final reply, because I don't want this to become some heated "religious" discussion. I answered your question, and I'll give you the final word.