True or false: religious people are mentally ill purely by virtue of being religious?

[Warren Stupidity]

24. The claim is not that religious people are mentally ill, but that religious beliefs are delusional.

They may or may not be symptomatic of other mental illnesses.

Another difficulty with the diagnosis of delusions is that almost all of these features can be found in "normal" beliefs. Many religious beliefs hold exactly the same features, yet are not universally considered delusional. These factors have led the psychiatrist Anthony David to note that "there is no acceptable (rather than accepted) definition of a delusion."[22] In practice, psychiatrists tend to diagnose a belief as delusional if it is either patently bizarre, causing significant distress, or excessively pre-occupying the patient, especially if the person is subsequently unswayed in belief by counter-evidence or reasonable arguments.

http://en.wikipedia.org/wiki/Delusion

As noted elsewhere, the DSM just makes this giant carve out for religious beliefs. The problem is that 'all of these features can be found in "normal" beliefs' where "normal" means "religious. So what are we to make of this?

It seems here we effectively vote on which religious delusions are normal enough to garner the outrage when noted that they are delusions, and then the others, those outside the majority view, are fair game for the dreaded label of "delusion".

My own view is that we are indoctrinated in delusional belief systems as children, those beliefs are reinforced by community peer pressure, and are thus, absurd and nonsensical as they are, considered "normal". Those of us raised outside this bubble of mass delusion look in on it with a mix of horror, amusement, incomprehension, and fascination. I can still remember when it dawned on me that people actually believed this stuff.

It is, again in my opinion, only a mental illness if one considers the sort of mass delusional behavior exhibited in for example totalitarian states "mental illness".

What would one consider Jonestown? Or Heaven's Gate? Or the Waco Koresh cult? Mental illness? Mass delusions? Normal behavior?