There's some good info here.
http://www.global-platonic-theater.com/global-platonic-theater.htm#heading
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Similarly, peace groups and congressional Democrats made a big deal of Bush’s alleged lies regarding Iraqi weapons of mass destruction. But this political posturing conveniently contributed to erasing from the public’s memory the fact that in 2003 Saddam’s purported weapons of mass destruction, on their own merits, were not an urgent concern to the U.S. population. They would certainly represent a threat to Iran, to Israel, to Europe, but their direct threat to the United States could be demonstrated only through Osama's logistical means to smuggle them into mainland U.S. territory as proven by the official 9/11 narrative. In other words, the rationale for the Iraq war was double-pronged: Saddam had weapons of mass destruction and Osama could deliver them through his 9/11 logistics. Without 9/11, the justification for the Iraq war would crumble. Keeping in mind that the Bush administration had to go through lengthy political maneuvering before being able to launch the Iraq war, it is likely that the absence of 9/11 would have made it impossible.
Yet, as of 2010-Oct, with very few small-scale exceptions—such as Veterans for 9/11 Truth and Cindy Sheehan—the peace movement has ignored 9/11 Truth. Some prominent peace leaders, such as Massachusetts Institute of Technology (MIT) professor emeritus Noam Chomsky, are actually among its most rabid opponents. As of 2010, Chomsky was reported to state that he would review 9/11 Truth only after some MIT structural engineering professor would communicate to him that the twin towers were demolished. Knowing that the average high school kid will understand the demonstration of the twin towers’ demolitions, Chomsky’s challenge is tantamount to confessing that he knows 9/11 to be a false flag but will wait for others to denounce it. In 2010-Nov, PressTV reported that Chomsky stated that "the Taliban [...] requested evidence…and the Bush administration refused to provide any [because] they did not have any." However, he stopped way short of going to the logical end of his reasoning, affirming instead that the FBI "believed that the plot may have been hatched in Afghanistan, but was probably implemented in the United Arab Emirates and Germany." This disingenuous statement could easily be interpreted as a damage-control tactic in the wake of David Ray Griffin's 2010-June essay on the illegality of the Afghan war based on the reality of 9/11.
Peace leaders’ failure to speak up on 9/11 adds another tricky piece to the puzzle of the 9/11 censorship. Since 9/11 Truth is by far the surest and quickest way to summarily cancel the post-9/11 wars and since 9/11 Truth holds the promise of preventing future false flags and therefore future wars, its benefit to the peace movement is self-evident. Chomsky and other peace leaders’ concerted efforts to steer their followers away from 9/11 Truth and send them on a wild goose chase behind a multitude of issues that 9/11 Truth would nullify are baffling.