....the relatively common atheist statement that theists are delusional seems to be the real point here.
What's worth understanding MM is that the "delusional" is not be about gods (or target a god specifically, if any), it can apply directly to the fact that many many theists just claim they KNOW.
It has nothing to do with god, the god invention is just a symptom of the delusion.
Their delusion is the idea that somehow they know.
Without the slightest shred of evidence required.
And then they try to reverse engineer the real universe (where rationality normally is the preferred tool of choice for life choices) by awarding the concept of "Faith" kudos.
It is absolutely delusional to give "Faith" (as a tool for making life choices) the slightest merit in the real observable world.
A rational person says "I don't know" when presented with your questions. An irrational person claims knowledge.