"But atheism is not a positive doctrine spread by allegations of miracles and revelations."
It can be spread in other ways. It doesn't matter how it is spread. The point is that it can be spread, and is spread in much the way that religions are spread: from father to son, from community to community, etc. This surely can't bother you much. Dawkins put it into language you can understand, calling it a 'meme.'
It seems that you are determined to ignore the argument, so it is worth repeating. Atheism is a rejection of a positive claim--the claim that gods exist. It has no supernatural origin. Indeed, atheism has originated spontaneously in many places at many times, as one would expect. It has not always been spread by word of mouth, as all religions have.
Your brand of theism is based on an immanent spiritual being that is not bound by space or time. Hence, it appears unlikely that the origin of the belief would be confined to single points in time and space. Why would the creator of the universe treat an ancient tribe of semites any more specially than any other group of human beings?
The fallacy of the argument is illustrated by the blind hypocrisy: if it were a culture of atheists creating more atheists you wouldn't think for a minute of employing the 'geographic' argument. What is good for the goose is good for the gander. And if you won't employ it against the gander, I won't let you employ it against the goose. More importantly, objective readers of such arguments can see for themselves the double standard. I submit the matter to the lurker. You can't reason a person out of a position they didn't reason themselves into.
Fine. Submit it to as many imaginary lurkers as you want. The fact remains that atheism has arisen spontaneously in many societies around the world. It is not really a doctrine of beliefs, but rather the rejection of a doctrine of beliefs. Skepticism is quite natural and quite ubiquitous in human society. Your counterclaim here rests on the flawed assumption that it is a specific set of doctrines. Your religion is a specific set of doctrines, and it does have only a single point of origin. It has not emerged spontaneously in any other place or time.
"He posed a challenge for theists--that they examine their own beliefs with the same level of skepticism that they examine non-Christian religious beliefs."
It isn't a very difficult challenge. But we must understand that we mean by 'skepticism' different things. Your idea of skepticism carries with it assumptions that make it equivalent with cynicism and smug dismissals. My kind of skepticism says, "I'll be agnostic until I look at the evidence." And this is precisely the kind of skepticism I have employed regarding my own beliefs and other beliefs.
Nonsense. We do not treat skepticism differently in this case. You and I are very much in agreement on the level of skepticism that non-Christian religions merit. We both routinely dismiss fantastic claims unless there is some good evidence to believe those claims. You don't buy every bottle of snake oil on the market just to make sure that it doesn't work. We are both used to putting our hands on our wallets when people come around asking for money. The difference is mainly in our approach to Christianity. You approach it as if the burden of proof were on non-believers to disprove the existence of God and other docrinal claims. Where your natural skepticism fails you is just in the area of evaluating Christian beliefs. When you don't get all agnosticky is when it comes to other proposed gods such as Zeus, Vishnu, Marduk, or the thousands of others that have been proposed throughout human history.
In fact, this is here again a case where atheists employ a double standard. This can be illustrated in the 'why we need faith' thread where I am insisting that we use standard types of reasoning and evidence in evaluating the Christian faith whereas the gent on the other side is treating it as self-evident that higher and more stringent standards be deployed. I would be very happy if you applied the same level of skepticism to Christianity that you applied to your own skepticism. 
OK, I'll be very happy to apply the same level of skepticism to Christianity, although I would have expected you to make a different request.

This is pure psychological projection on your part. If you applied "standard types of reasoning" to Christianity, I do not think that you would be defending it as vigorously as you do. For example, standard reasoning is that the burden of proof lie with the person who makes a positive assertion, not the one who doubts it.
"No, it isn't. This is just your knee-jerk attempt to turn the tables, as pointed out above."
As EB said, you merely prove the point. I asserted that you would deny the implications if the shoe was on the other foot. This you did. I only briefly sketched why the implications would be the same. My emphasis was on the fact that you denied it. Face it Cop. I know you atheists like every inch of my glorious naked body. 
Why is it that evangelicals are so obsessed with homo-erotic images? Oh, well, I guess we'll have to leave that one to the therapists.

But, of course, you once again pretend that you didn't get the point. My argument has consistently been that the shoe wasn't on the other foot, because your analogy failed pretty badly. And I've reiterated the argument again in this post. But, even if the shoe were on the other foot, atheism would actually be a "belief system" that has arisen spontaneously at different times in different areas of the world. So your clumsy attempt at an analogy even fails on those grounds.
"I do not think that religion is the default position for idiots. It requires considerable intellect to be able to rationalize all the contradictions."
A lot of work to say that religious people are idiots without saying that they are idiots. Fortunately, people are smarter than you give them credit for. I as an apologist am counting on it. You fear it. Proof positive: you can't tolerate the notion of even talking about Intelligent Design in a science classroom- not even for purposes of debunking it.
Actually, I have gone beyond tolerating the notion of talking about it. I have talked at length about it many times in this forum. What you mean is that I cannot abide teaching children that ID is a reasonable scientific theory. That is true. And I don't think that fanatics of any stripe are idiots. I agree with Michael Shermer that smart people believe bad ideas because they are better than others at defending them. And I have never claimed you were stupid, sntjohnny. Indeed, you are very, very smart, and far more accomplished than I at defending bad ideas.
