That's the best question I can think of which answers the whole of this thread.
I would even take that step further: What is it about people that makes them fabricate ideas out of thin air, and then assert them as fact, often tying their claims into twisted knots of fallacy and deception, without bothering to test putative facts against actual observation, attacking established science, even when the assertions they make conflict with widely studied work that has survived testing?
What is it about people who appear to have had no formal science education, and yet believe they have solved the most difficult questions of science, including those which have no solution, as if endowed with superhuman mental capacity or something like a self-granted divine right of kings, in which they simply proclaim themselves to have surpassed science by simply ignoring it?
What is it about people who never did well in science, and yet they have such and axe to grind against the people who did? Are these the people who got kicked out of biology class for dipping hand-rolled cigarettes into the formaldehyde while their lab partners were doing the actual dissections and writing the reports ? Their spurious claims always come bundled with premeditated insults.
I guess it's a legitimate question for a thread in psychology. But what a boring question.