I have my Theory of Gulling (yes, it's a word) whereby the probability of someone believing something is a function of
- How gullible they are
- How far you are trying to take them off of what they currently believe (sometimes you are giving them permission to believe in something)
- The manipulator's skill
For reasons that escape me, Alex Jones is pretty good at the third one, aided by the other two. I cringe.
Some people also are just stupid. I had a supervisor at work who insisted to me the Moon is hollow and a space station. At first I thought he was joking but he insisted it was true. I told him that is just too silly a claim, he insisted that NO, two Russian scientists even put their careers on the line to make this argument.
So.....not knowing how to refute this, I decided to research it. He "learned" all of this from a video apparently. Some quick Googling/Youtubing brought up the video, turned out it was a segment of an episode of "Ancient Aliens"

? So I watched it and yes this was his source of info for his claims. So I then embark on about three hours of research, studying the history of the formation of the Moon, crater formation, craters on the Earth, Mercury, and Mars along with the Moon, ancient Chinese astronomy, the two Soviet scientists, etc...and came to the conclusion that:
1) The Moon is most definitely ***NOT*** an alien space station or hollow and
2) The "Ancient Aliens" episode lied and twisted things totally out of proportion
I presented my refutation to him at work and saw his brain processing as he hadn't thought of things that way. A coworker asked what was up, I said the supervisor insists the Moon is hollow and an alien space station. The coworker basically said that's nuts, to which the supervisor goes, "It is, it's hollow!" to which the co-worker goes, "Yeah, so's your head."