Bin Laden's reason for 9-11: The humiliation and disgrace 80 years ago?

In his pronouncements, bin Laden makes frequent references to history. One of the most dramatic was his mention, in the October 7th videotape, of the “humiliation and disgrace” that Islam has suffered for “more than eighty years.” Most American—and, no doubt, European—observers of the Middle Eastern scene began an anxious search for something that had happened “more than eighty years” ago, and came up with various answers. We can be fairly sure that bin Laden’s Muslim listeners—the people he was addressing—picked up the allusion immediately and appreciated its significance. In 1918, the Ottoman sultanate, the last of the great Muslim empires, was finally defeated—its capital, Constantinople, occupied, its sovereign held captive, and much of its territory partitioned between the victorious British and French Empires. The Turks eventually succeeded in liberating their homeland, but they did so not in the name of Islam but through a secular nationalist movement. One of their first acts, in November, 1922, was to abolish the sultanate. The Ottoman sovereign was not only a sultan, the ruler of a specific state; he was also widely recognized as the caliph, the head of all Sunni Islam, and the last in a line of such rulers that dated back to the death of the Prophet Muhammad, in 632 A.D. After a brief experiment with a separate caliph, the Turks, in March, 1924, abolished the caliphate, too. During its nearly thirteen centuries, the caliphate had gone through many vicissitudes, but it remained a potent symbol of Muslim unity, even identity, and its abolition, under the double assault of foreign imperialists and domestic modernists, was felt throughout the Muslim world.
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Annals of Religion: The Revolt of Islam : The New Yorker

So, if I understand all this correctly, Bin Laden did the 9-11 attack on New York as revenge for bringing the last Caliphate (successor to Mohammed) to it's knees in 1918 at the close of World War I. 

George Bush as president didn't mention this fact to the American people though because it wouldn't have made any sense at all to them. However, now with a new caliphate in place in Northern and Western Iraq and Northern Syria, it might.