When is a Religious Belief Delusional?

[robvalue]

I don't care if you reject the notion of objects of intellect. To me that is a matter of opinion and cause for debate. What I really want to know is if you think people who believe in mathematical objects are delusional.

You’re really comparing mathematics to the concept of a deity? Really, Chad?

He's been doing that since I joined the forum. I've been over it loads of times, with him and other people.

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I can kind of reverse the question here, and ask why someone would refer to their own belief as religious. What is the line that separates regular beliefs from religious ones?

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PS: Let me add that atheists can be religious, so "God" is not an adequate cut-off point for what counts as religious belief.

Did any theists answer this one?