Why conspiracy theories lumped together
There's a rash of these kind of stories lately, all promoting the idea that all those who question official explanations of events are the same, that it's something in their psychological makeup rather than gaping holes in said official stories.
Some of the "conspiracy theories" are ridiculous, but some serious issues get lumped together with the total crackpot theories in order to deflect serious examination.
Look at the flip side of this argument - why are higher income people more likely to accept the official account even when it makes no sense? I think it's because they have more of a stake in the established system, the idea that the authorities are lying to them threatens their sense of security.
I don't think the Masons run the country, but I know the 9/11 report makes no sense.