The truth may not be anything like what anyone supposes it to be, especially when no one actually knows it all.
People who rely on a slur of others' notions, deriding them with an unintelligent label like "conspiracy theorist", are more suspect than anyone with one fact and a purported explanation of everything. . . .
Jeb, Dub, or George HW deriding anyone who knows that Prescott Bush carried a bag with twenty million bucks to Hitler before the Reichstag Fire destroyed the German legislative branch of government, and funded Hitlers' move to assume dictatorial powers in Germany as a "Conspiracy Theorist" have less credibility than the people they mock.
When Obama throws out that same slur on his critics, you'd be smarter to ask what he's afraid of people knowing. . . . . . what he's covering up with his stupid factless allegations.