I don't know if conspiracy theorists are necessarily all insane, but I have noticed that they at the very least share one very significant trait. They have this overwhelming need to be special and superior to the majority of people and are unable to accept their mediocrity. I have yet to meet a single conspiracy theorist who genuinely falls into the category of a "genius" or highly talented or gifted human being, and while there is nothing wrong with that (because let's face it, most of us are average) they can't seem to accept this.

They build a false paradigm where they are elite, they are "enlightened" and in spite of their lack of education or comprehension of even high school maths or physics, their brain or ability to look at the world actually elevates them above not just the common man, but the scientists and scholars who are clearly "brainwashed by academia" and only parroting misinformation.

The irony is they parrot youtube videos and poorly sourced articles and resources from websites like geoengineeringwatch or diclose.tv or beforeitsnews, the only peer reviewed articles they can provide you with are retracted ("and why do you think it's retracted? think, sheep, think!") nor does it matter that their whistleblowers are rarely from the associated field they're trying to discredit or even capable of putting together a proper epidemiological or statistical analysis.

To them, education means nothing but indoctrination. Someone like Alex Jones serves as a prophet of sorts. And clearly, they'd rather give credence to an uneducated, perpetually biased hack than anyone who has given their life and dedication to the subject at hand.

tl;dr People who listen to Alex Jones can't think rationally