http://representativepress.blogspot.com/2005/06/man-who-conceived-and-directed-sept.html
U.S. Policy On Israel Key Motive for 9/11 Attacks
"After he was captured in Pakistan in early 2003, he told his interrogators that although he had developed no special complaint about America in his years here, he [ Khalid Shaikh Mohammed ] felt strongly that U.S. support of Israel was wrong and could be corrected by attacking the United States,"" reports Los Angeles Times writer Terry McDermott.

The man who conceived and directed the Sept. 11 terrorist attacks, was motivated by his strong disagreement with American support for Israel
His name is Khalid Shaikh Mohammed and his motivation for the crime of the 9/11 attacks was his objection to the US foreign policy of supporting Israel said the final report of the Sept. 11 Commission.

"... in an early version of the Sept. 11 plot, he [ Khalid Shaikh Mohammed ] proposed flying one of the hijacked planes himself, landing it in the United States and, after killing all the men aboard, making a speech urging America to change its Middle East policies."

9/11 Motives shared by Khalid Shaikh Mohammed, the man who thought up the idea and directed the plan for the 9/11 attacks, and Mohamed Atta, the man who was the ring leader of the teams that committed the 9/11 terrorists attacks.
The ring leader of the September 11th suicide hijackers also held the same grievance. Mohamed Atta coordinated the other 9/11 terrorists and he was a pilot who flew into the WTC. Ralph Bodenstein, who traveled, worked and talked a lot with Mohamed Atta, is quoted as describing Mohamed Atta as "most imbued actually about Israeli politics in the region and about US protection of these Israeli politics in the region. And he was to a degree personally suffering from that."

The two terrorist pilots who crashed the two planes into the WTC shared the same motivation. Mohamed Atta was the pilot who crashed into WTC1 and Marwan al-Shehhi, the pilot who flew into WTC 2, was focused on the same thing, "when someone asked why he and Atta never laughed, Shehhi retorted,"How can you laugh when people are dying in Palestine?"" - page 162 THE 9/11 COMMISSION REPORT

Debunking "inside job":
http://representativepress.blogspot.com/2007/04/re-pre-collapse-bowing-debunks-911.html
http://representativepress.blogspot.com/2006/05/911-conspiracy-people-are-still-at-it.html
http://representativepress.blogspot.com/2006/09/wtc-7-was-severely-damaged-on-south.html
http://www.representativepress.org/BowingDebunksExplosives.html
http://www.geocities.com/factsnotfantasy/
http://representativepress.blogspot.com/2007/04/motives-for-september-11-2001-attacks.html