I thought I would quote more from FSU Professor of Public Policy, Lance deHaven-Smith's Conspiracy Theory in America:
The Founders [of America] would also be shocked that conspiracy deniers attack and ridicule individuals who voice conspiracy beliefs and yet ignore institutional purveyors of conspiratorial ideas even though the latter are the ideas that have proven truly dangerous in modern American history. Since at least the end of World War II, the citadel of theories alleging nefarious political conspiracies has been, not amateur investigators of the Kennedy assassination and other political crimes and tragedies, but the United States government. In the first three decades of the post-World War II era, U.S. officials asserted that communists were conspiring to take over the world, that the U.S. bureaucracy was riddled with Soviet spies, and that the civil rights and antiwar movements of the 1960s were creatures of Soviet influence. More recently, they have claimed that Iraq was complicit in 9/11, failed to dispose of its biological weapons, and attempted to purchase uranium in Niger so it could construct nuclear bombs. Although these ideas were untrue, they influenced millions of Americans, fomented social panic, fueled wars, and resulted in massive loss of life and destructions of property. If conspiracy deniers are so concerned about the dangers of conspiratorial suspicions in American politics and civic culture, why have they ignored the conspiracism of U.S. politicians?