When is a Religious Belief Delusional?

[Whateverist]

Not if it's taken to be a political construct rather than an inherent or objective fact.  Moreover, even as an inherent or objective fact, it can be derived from the morals of fairness, that all should be treated as equal, regardless of any objective existence of such an equality.

Any notion of fairness already presupposes some measure existential equality. You're arguing in circles. Let's step further back. I believe there are moral facts. Are those delusions?

You could always be mistaken in your identification of the morals you identify as facts.  Thinking they are facts isn't in and of itself delusional, whether or not I choose to conceptualize morality in that way.

Do you think people who don't conceptualize morality as you do are delusional?