Here's a video of Dawkins making a similar argument in response to an audience question:
The premise of his response is that there's no reason to believe in one god over another. Belief in a particular God is just an accident of upbringing. If one grew up in Classical Greece, they'd believe in Zeus. Viking-era Denmark, they'd believe in Thor, and so on. Believing in the God of the Torah is just as arbitrary as believing in the Flying Spaghetti Monster. Is he right?
To answer that question, I'll go back through some of my previous posts and apply the same standards to the Flying Spaghetti Monster.
1. Defining God viaPrincipal Component Analysis
Compared to the God of the Torah, the Flying Spaghetti Monster has very specific, knowable, observable characteristics. Thus, it'd have a relatively low “Prior Believability” score. If these two were the only options, the Spaghetti Monster would have a slightly lower prior probability, but more evidence would be needed in order to make a definitive choice.
2. Extraordinary Claims and the Principle of Indifference
Some might disagree with my conclusions in #1, and I doubt I could prove them here. So instead of relying on that for a prior probability, I'll start with the Principle of Indifference. Until evidence is evaluated, I'll start by regarding the God of Abraham and the Flying Spaghetti Monster as equally probable.
3. Verifying Torah Model Predictions
I'm not aware of any predictions made by written accounts about the Flying Spaghetti Monster. No evidence means no change from prior probability unless there is evidence for another mutually exclusive possibility. The verified Torah predictions move it slightly in favor of its God, which reduces the probability of the Spaghetti Monster. Maybe something like 60% for the God of the Torah and 40% for the Spaghetti Monster, if those are the only two options.
4. The Religiosity of Bigfoot Believers
I suspect that Bigfoot-believers might be more likely to believe in the Flying Spaghetti Monster than non-Bigfoot-believers are, but that probably isn't relevant here.
5. The Gospel According to a Map
The prophets of Israel made correct predictions that are more probable if their God exists than if he doesn't. The prophetic predictions are independent of the Torah's predictions used above, so they count as additional evidence. No such evidence exists for the Spaghetti Monster, at least not that I'm aware of. Now I'm closer to 70% for Israel's God and 30% for the Spaghetti Monster.
There is a lot more data to consider, but it's futile. My above attempts at evaluating evidence also are futile, because the probabilities I assigned are [arguably] arbitrary and the strength of the evidence surely would be questioned by people who disagree. Thus, it'd be pointless to present evidence and give my evaluation of it. Fortunately, my most recent post provided a way to use everyone's evaluation of the evidence, giving mine no more weight than anyone else's.
6. The EnsembleModel of Religion
The ensemble model provides a very clear answer. In the absence of unambiguous evidence or relevant insight that others don't have, if humans have any skill at all in discerning such things, the most rational default position is that the God of Abraham probably is the true God and any other, including the Flying Spaghetti Monster, probably isn't. Virtually nobody who has evaluated the evidence believes in the Spaghetti Monster, which suggests that the evidence for it is very weak at best. That doesn't mean it doesn't exist. It's possible that everyone is wrong about it. But believing that would require very strong evidence, and we don't have it.
If writings about the Spaghetti Monster gave accurate predictions of world-changing future events, I'd spend a lot more time studying them. And if millions of people examined the available data and concluded that it's real, I wouldn't necessarily believe in it, but I'd take it very seriously and would be very, very careful about calling it a "delusion" or saying there's "no evidence" for it. Until that happens, or I discover compelling new evidence for it, I probably won't be joining the Church of the Flying Spaghetti Monster, although I wouldn't mind visiting it some time.