Report: Top Israeli Politician Naftali Bennett Played Key Role in 1996 Massacre That Motivated Bin Laden and Al Qaeda to Attack U.S. on 9/11
Note this part as well: "Bin Laden cited Qana at least four more times: in a July, 1996 interview with Robert Fisk; a November, 1996 interview with a London newspaper; a 1999 interview with al Jazeera; and an October, 2001 online interview. He specifically said his goal was to make Americans "taste what we tasted."
In addition, Mohammed Atta signed a will at the beginning of Operation Grapes of Wrath. In Lawrence Wright's book The Looming Tower, he writes that "According to one of his friends, Atta was enraged, and by filling out his last testament during the attack he was offering his life in response.""
See more on main motive for 9/11 here: