If there is no way to know if God even exists, then how could it be more likely that the Christian idea of God is somehow wrong or less likely than another idea?
I didn't say that Xtianity was less likely than any other religion. That seems to be what you're saying here, and I want to be clear that that is not what I said. I said that the Xtian depiction of the supreme being is likely not close to the real supreme being. That is far and away a different thing than to say that Xtianity's version is less likely than another's - which necessarily implies that one of the other religions is "more likely". And if I am saying that another religion is more likely than Xtianity, then I would be claiming to have knowledge that no man has. So, let's get that cleared up now.
But your entire rebuttal is basically a leading question, and one that I didn't make (this seems to be happening a lot here today: people making up stuff and attributing it to me). My position was not phrased in such a way that one could ask me if religion x (or, as you call it, an "idea") is "more likely" than another. That makes this a relative comparison between religions, or ideas, and my statment was not a relative one. Do you understand this distinction?
What I said was that the Xtian version of the supreme being (and all other religions, as far as that goes) is not anywhere close to the real version. I said nothing about Xtianity being more likely, or less likely, than another religion or "idea".
Most religions are equally in error, and equally valid.
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edit to add:
Also, I said "more than likely"; not "more likely".
There is a difference.