As futile as it is, I’m reposting what I said in the other thread.
JFK was killed by a Castro sympathizer, after repeatedly trying to have Castro assassinated. That’s pretty open and shut.
You want to go after real conspiracies, look for the subtle ones. Why did the Pro-Life movement get going in 1979, instead of 1973? Why is the Tea Party so angry about the deficit now, when they accepted pro-cyclical deficit spending in boom years? Why do politicians & interest groups in the central US manage to find a hot button right-wing issue for the ballot every 2-4 years (gay marriage, immigration, stem cell research…)?
The real conspiracies have names like Chamber of Commerce, Democratic Party, Republican Party, Tea Party, Democratic Leadership Council, Project for a New American Century, Christian Coalition, American Federation of Teachers, & yes, al-Qaeda. You can join one if you like. But if you’re worried about mythical unseen conspiracies, you’re distracted from the real ones in plain sight.