In short, the lack of confirming detail in the historical record, the late development of biographical material about the Islamic prophet, the atmosp… - Robert Bruce Spencer

As they did in other lands they conquered, the Arabs made a clean sweep of the Persian Empire. Islam holds the achievements of all civilizations before their conquest by Muslims to be worthless trash, jahiliyya, products of the society of unbelievers. And so in the fourteenth century the pioneering Arab historian Ibn Khaldun had to ask, “Where are the sciences of the Persians that Umar ordered to be wiped out at the time of the conquest?” The answer was that they had been obliterated at the hands of those who believed, as in a quip attributed to the Caliph Umar, that if books agreed with the Qur’an, they were superfluous, and if they disagreed with it, they were heretical—in either case, of no account.

By now the attentive reader will have noticed a curious absence from the drama surrounding Jewish settlement in Palestine, the rise of Zionism, and the establishment of the Jewish state: through it all, the “Palestinians,” named as such, are nowhere to be seen. It is no accident that neither Mark Twain, nor any of the series of English travelers who visited the area, nor anyone else who traveled through desolate Palestine over the centuries ever mentioned the “Palestinian” people. They spoke of encountering Muslim Arabs, as well as Jews, Christian Arabs, and others, but no one, among multitudes of people who wrote about Palestine, ever refers to any Palestinians. Nor do the many British white papers and other documents the British government produced during the Mandate period ever mention the Palestinians. The opposing factions in those documents are the Jews and the Arabs. There is a very simple reason for this: there were no Palestinians.

It would be patently obvious to everyone that the Islamic State is Islamic—were it not for the fact that Barack Obama, Joe Biden, John Kerry, David Cameron, and virtually every other authority in the Western world insist that it’s not.