No one can prove that the belief in God is in fact a false belief.

You're definition of delusion is a little thin. According to Google, a delusion is "an erroneous belief that is held in the face of evidence to the contrary." The problem with the (dis-)belief in deities is that there is so little proof either way. That is why it is simply a belief, not a fact.

Saying whether a belief is rational doesn't seem to make a lot of sense. But, as much as humans can be rational, great minds have written rational arguments supporting belief in god(s). And not because these thinkers are in the minority.

Humans are hard-wired to believe in god(s); we are inherently superstitious. In fact, because billions do believe in god(s), disbelief without conclusive evidence to the contrary seems a bit delusional.

we ration things based on observations and experiences. that is the common ration. i don't believe in a deity or some shit, but others do. most believe just because their parents put it into their heads, and i admit, that is irrational. but others believe because of personal experiences that no one else could explain (speaking with a dead relative, defeating a disease that was supposed to kill them under all research and rational). is it really irratonal to believe in something higher because of these experiences that no one could explain, except for maybe, a preacher?

Delusion: The state of having a false belief.

Seems pretty black and white to me. If you don't believe god exists then you must believe people that do are deluded. I believe everyone is deluded in one way or another though.

That doesn't mean it's not false.

"Absence of evidence is evidence of absence"

"The invisible and the non-existent look very much alike."

No one can prove that leprechauns, the tooth fairy or that other mythical creatures exist....yet no one in their right mind believes they exist. If anyone believed that leprechauns, fairies or unicorns or whatever, they would be thought to be delusional wouldn't they?

"Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful."

1. Well I guess there are a lot of different definitions for words these days. Even with your definition, there is plenty of evidence to the contrary. That evidence is the lack of evidence on beliefs side. I definitely agree with you though, that it's not fact, just belief.

2. Pointing out irrational beliefs makes perfect sense. If a friend of yours wouldn't leave their house cause they were afraid ghosts would possess him when he went outside, you would try to talk him out of it right?

3. Humans are not hard-wired to believe in god(s). Just because the majority thought one way in the past doesn't mean it's true. insert flat-earth argument here

It's impossible to prove that something does not exist (unless you set preconditions, like ice cannot exist above a certain temperature). So until someone can prove the positive, we'll just have to dismiss it and ignore it as a possibility.

Belief has nothing to do with religion. It is a trick to make people shut-up and doubt their own eyes.

Which god? How many gods? Why should we pretend to know what can't be known? Is that "good?"

Deluded is the right word. Maybe chumped-out would be more descriptive.