There is a book entitled Why People Believe Wierd Things by Michael Shermer--
might be a good place to start.
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www.google.com]
And people like Ickes do not work in a vacuum. Often they get their material from a variety of sources, novels, movies, books that have previously seeded the public imagination, and find ways to link the material to current social anxieties.
They can only get attention and a following within a particular social groove, what social scientists have termed 'the cultic milieu', which in some cases, also overlaps with a culture of conspiracy.
The thing about pseudoscience and conspiracies is that they are based on hypotheses that cannot be disproved. Actual science is based on hypotheses that can be proven wrong---aka the null hypothesis.
If you cannot prove an idea wrong, it hangs around in your head and is joined by other ideas just like it that cannot be disproved.
There is a kind of instant comraderie if people share these beliefs.
Also, because these kinds of beliefs, unlike scientific ideas cannot be disproved, they offer the promise of stablity and security, because they cannot be disproved--which is very appealing for those threatened by change.
Persons already burdened by paranoia can find their pre-existing paranoid emotions validated by a fact proof conspiracy theory, whether it is one they come up with on thier own, or something provided ready-made and off the rack, like Lizardology.