"conspiracy theories" contradicting an official narrative arise when governments are seen to be stonewalling investigations and going to some lengths to hide information surrounding a significant event like 9/11, as it is only natural that people will speculate as to "what really happened" and just what is it that the government is apparently so anxious that we not find out.
He also points out how authority figures use the dreaded "conspiracy theory" label to cut off debate and disparage anyone who questions the official story as being on the loony tune fringe - e.g. Tony "The Poodle" bLIAR saying in 2003 anyone who thought that oil had anything to do with the Boy-Idjit-Emperor's Iraq invasion was a "conspiracy theorist."
Just found this with a google search after hearing Paul's remark about the Poodle's disparaging remark about conspiracy theorists above:
Cheney, energy and Iraq invasion
Supreme Court to rule on secrecySNIP
There are many other indications that, despite the Bush administration's repeated and insistent denials, petroleum politics may have played a crucial role in the U.S. invasion of Iraq.
For instance, both the State Department and the Pentagon had pre-war planning groups that included a focus on Iraq's oil industry; protecting the industry was an early U.S. objective in the war.
In October 2002, Oil and Gas International reported that U.S. planning was already under way to reorganize Iraq's oil and business relationships.
In January 2003, the Wall Street Journal reported that representatives from Exxon Mobil Corp., ChevronTexaco Corp., ConocoPhillips and Halliburton, among others, were meeting with Vice President Cheney's staff to plan the post- war revival of Iraq's oil industry.
Cheney is said to have once remarked that the country that controls Middle East oil can exercise a "stranglehold" over the global economy.
One-time Bush speech writer David Frum wrote in "The Right Man," his 2003 biography of his boss, that the United States' "war on terror" was designed to "bring new freedom and new stability to the most vicious and violent quadrant of the Earth -- and new prosperity to us all, by securing the world's largest pool of oil."
http://www.sfgate.com/cgi-bin/article.cgi?file=/chronicle/archive/2004/03/21/ING0H5LTDA1.DTL