For me I think it's because a lot of the conspiracy theory materials out there are very similar to my own delusions. 99% facts and then one little assumption and the whole thing goes haywire. It's not even about the theories themselves, but how they are often presented. There is some respectable material out there, calm, mature and informative, but it's mixed in with a sea of sensationalist stuff. Just trying to wade through it can be very difficult for someone with a mind like my own. Everything starts to blur together, and I won't know what to think anymore, but I will know that I feel very strongly and want what's best and safest for my species, for my nation's people, for my family. I will know that there are lies and conspiracies, because well, humans, but I won't be able to sort it out. Then it's like that fine line between feeling like a selfish coward if I just back out and ignore it all and focus on my own happiness, and feeling like an egotistical nutter for thinking that I could make a difference anyway. Oh gosh it sucks something serious.