Conspiracy Theorists (is that giving them too grand a title?) or, at least, the people who believe conspiracy theories, are halfwits, and, I guess, it is very easy to say they are halfwits, but why are they? Is it the stupid who believe this stuff? Is it lack of education? Are they just bored? Is the media to blame using fear to sell its product? Is it the duplicity of politicians that feeds this stuff?
What is it? 
I don't know. 
Some of it is just mind boggling, the kind of stuff that bends your brain trying to understand it.
I know one thing, I never, ever believe that the people perpetrating this crap actually believe it is true, they do it for another reason, other than the good of the people on whom they are inflicting their rubbish. They do it for self promotion, they do it for their own gains, they do it because they can, maybe.
It really is evil inflicted on the world.