Illogical fallacy of Equivocation on top of another called Argumentum ad populum.
Extraordinary does not mean by what people think.... it means by standards of science i.e. physics, biology, chemistry, etc. etc.... you know those things that define REAL knowledge.
In my opinion, words serve people, not the other way around. So if a word "doesn't mean what people think," then we ought to find a more accurate word for what we mean.
Your argument about the MAJORITY opinion is rejected by those same majority.
The majority of people reject the god delusion that is not theirs.
But atheism isn't arguing against any particular God, it's a position against all Gods simultaneously. For that reason, it is appropriate to have an atheist camp and a theist camp, regardless of further nuances. We could, if we wanted to, distinguish ourselves into different brands of atheist: anti-Christian, or anti-Islam, but we generally don't.
So if we go by the majority opinion which is by the way another illogical fallacy called Argumentum ad populum, we find that all god delusions are false since any one god is rejected by the majority of humans who do not share that same delusion.
I'm not arguing that God exists - I'm an atheist. I'm arguing that the belief in God is not extraordinary, as measured by what's ordinary. This is not a fallacy, it's a straight-up measurement of popular opinion.
Putting aside the logical fallacies, we also know that the majority of people used to think that lightening used to be a physical manifestation of their god's anger until Benjamin Franklin proved otherwise.
Does that mean that up until the majority of the people stopped thinking that lightening came out of the derrieres of gods that it in fact did up until that point?
The majority of people used to think that demonic possession was the cause of lunacy.... does that mean it was true and then it became false when the majority of people started believing in psychology?
You make my case with your examples. For them to even be popular delusions, they have to first be popular and ordinary concepts for their time. I am sure opinions will change once we've demonstrated to others' satisfaction that no God exists at all. Until then, the false belief will continue to be the mainstream belief and quite common, usual, and ordinary.
Labeling something an extraordinary belief has no probative value whatsoever. There are many amazing things in the world and many mundane things. One cannot separate the two entirely by way of what smacks us as abnormal. It's a place to start, and spawns good questions, but it's hardly much more than an argument from incredulity and a lack of imagination.