A wonderful essay deconstructing the Bush Administration's debacle in Iraq, called
12 Books in Search of a Policy, reminds us why, aomng the many other sophistries used to justify the invasion, it is wrong to think that the 9/11 attacks were perpetrated by "Islamists":
Holmes rejects any direct connection between Islamic religious extremism and the 9/11 attacks, although he recognizes that Islamic vilification of the United States and other Western powers is often expressed in apocalyptically religious language. "Emphasizing religious extremism as the motivation for the [9/11] plot, whatever it reveals," he argues, "…terminates inquiry prematurely, encouraging us to view the attack ahistorically as an expression of 'radical Salafism,' a fundamentalist movement within Islam that allegedly drives its adherents to homicidal violence against infidels" (p. 2). This approach, he points out, is distinctly tautological: "Appeals to social norms or a culture of martyrdom are not very helpful…. They are tantamount to saying that suicidal terrorism is caused by a proclivity to suicidal terrorism" (p. 20).
Instead, he suggests, "The mobilizing ideology behind 9/11 was not Islam, or even Islamic fundamentalism, but rather a specific narrative of blame" (p. 63). He insists on putting the focus on the actual perpetrators, the 19 men who executed the attacks in New York and Washington -- 15 Saudi Arabians, two citizens of the United Arab Emirates, one Egyptian, and one Lebanese. None of them was particularly religious.