A founding member of an organization run by Imam Feisal Abdul Rauf, the driving force behind the planned mosque near Ground Zero, claims that the 9/11 attacks were an "inside job" and that Muslims have been made scapegoats, The Post has learned.

Faiz Khan -- who has preached at least twice at the former Burlington Coat Factory building, the site of the proposed mosque -- was for years Rauf's partner in the American Society for the Advancement of Muslims, which is dedicated to promoting a better understanding of Islam.

Khan also serves on the advisory board of Muslims for 9/11 Truth and is a founder of the Muslim-Jewish-Christian Alliance for 9/11 Truth, known as MUJCA.

On MUJCA's Web site, Khan wrote that "the inescapable fact [is] that 9/11 was an inside job."

"The prime factor for the success of the criminal mission known as 9/11 did not come from the quarter known as 'militant Islam,' although the phenomenon known as 'militant Islamic networks' may have played a partial role, or even a less than partial role -- perhaps the role of patsy and scapegoat," he wrote in documents uncovered by the Investigative Project on Terrorism.

Khan was listed as one of three directors of the American Society for the Advancement of Muslims in its 1997 incorporation papers, when it went by the name of the American Sufi Muslim Association.

ASMA and Rauf's Cordoba Initiative are spearheading the drive to create a $100 million Islamic cultural center and mosque near Ground Zero.

In an e-mail exchange with The Post, Khan said he ended his affiliation with the ASMA in "2002 and 2003," although that claim is contradicted by a record of him speaking at a 2006 ASMA conference in Copenhagen, where his bio listed him as a board member.

When The Post asked Khan who he thought was responsible for 9/11, he initially declined comment, but later said in an e-mail: "I am certain of a few things . . . The towers and WTC 7 could not have collapsed without controlled demolition place from the 'inside.' "

Ray Locker, managing director of the Investigative Project on Terrorism, said: "For someone who claims he wants the mosque project near Ground Zero to help build bridges and heal the wounds from 9/11, it's odd that one of Feisal Rauf's fellow bridge builders is someone who thinks the attacks that killed more than 3,000 people were an 'inside job' by the US government."

Khan told a group of 9/11 deniers at a 2006 Chicago summit called "Revealing the Truth/Reclaiming Our Future" that "the most logical explanation" for 9/11 is that the hijackers were working for corporate America and that the heroin trade creates "billions of dollars" that are laundered by "Citicorp and Procter & Gamble."

Rauf's spokesman didn't return calls for comment.

Meanwhile, Rauf said yesterday on ABC's "This Week" that he wasn't "making a threat" when he said moving the mosque would incite Islamic extremists to attack the United States -- although he insisted the warning held true.

"I've never made a threat, never expressed a threat, never," Rauf said. "I would never threaten violence ever, because I am a man of peace, dedicated to peace."