Pretty obvious in terms of the findings but I'm sure it will come as a shock that not only are these not the brightest individuals, they have issues with not feeling superior to others.
Why some people are willing to believe conspiracy theories
People can be prone to believe in conspiracy theories due to a combination of personality traits and motivations, including relying strongly on their intuition, feeling a sense of antagonism and superiority toward others, and perceiving threats in their environment.
www.apa.org