Well, most conspiracy theories HAVE to be “anti-authority,” because ONLY an entity as large and powerful as the federal government could conceivably pull off some of the things that conspiracy theorists worry about.
IF you accept the notion (I don’t, I think it’s preposterous) that Lee Harvey Oswald was a mere patsy, you HAVE to start asking, “Who’s powerful enough to get him in and out of Russia, to get him a job in a place where he’d have a clear shot at the President, to kill him off before he could talk? THAT requires a vast conspiracy, which means the very highest levels of the government MUST have been in on it.”
If you look at ANY assassination or terrorist incident, you’ll find dozens of minor coincidences that enable it to succeed (and when they fail, of course, there may be dozens of minor coincidences that lead to the failure). If you’re NOT conspiracy-minded, you dismiss such coincidences as mere chance. If you ARE conspiracy-minded, you look at all those coincidences and say, “That COULDN’T have been mere chance. To make all those dozens of things happen, there had to be MAJOR planning and forethought! This had to be EXTREMELY well-organized! A few crooks or a few terrorists couldn’t have made ALL that happen. This must go all the way to the top.”
The first attempt to blow up the World Trade Center was a fiasco, and the conspirators were roundly mocked for their stupidity and incompetence (remember that comedy rap video about the hapless Mohammed Salameh?). Nobody suggested that there was a huge conspiracy then, but that’s ONLY because the attack was an abysmakl failure.
Well, the guys who pulled off the 9/11 attacks weren’t any smarter than Mohammed Salameh. They just got a lot luckier. If they’d been busted at the strip club where they spent all their spare time, a few days before 9/11, people would be laughing at THEM, too.
But because they got lucky and managed to destroy the WTC, people don’t laugh at them. Instead, they look at them and think, “A bunch of moronic towelheads couldn’t have pulled off something THIS big. They HAD to have had help. WHo’s strong and powerful enough to manipulate this and pull it of? It HAD to be a massive conspiracy that began at the highest level of government.”