It is said that if you know your enemies and know yourself, you will not be imperiled in a hundred battles; if you do not know your enemies but do know yourself, you will win one and lose one; if you do not know your enemies nor yourself, you will be imperiled in every single battle.
After 9/11, Americans seeking to know and understand Al Qaeda could read The Looming Tower by Lawrence Wright.
Today, a new enemy has appeared in ISIS and knowing and understanding what motivates ISIS is crucial in eventually defeating it. While there isn't yet an ISIS themed companion book to "The Looking Tower," Graeme Wood's lengthy Atlantic article is a good place to start. What ISIS Really Wants:
The reality is that the Islamic State is Islamic. Very Islamic. Yes, it has attracted psychopaths and adventure seekers, drawn largely from the disaffected populations of the Middle East and Europe. But the religion preached by its most ardent followers derives from coherent and even learned interpretations of Islam.
Virtually every major decision and law promulgated by the Islamic State adheres to what it calls, in its press and pronouncements, and on its billboards, license plates, stationery, and coins, “the Prophetic methodology,” which means following the prophecy and example of Muhammad, in punctilious detail. Muslims can reject the Islamic State; nearly all do. But pretending that it isn’t actually a religious, millenarian group, with theology that must be understood to be combatted, has already led the United States to underestimate it and back foolish schemes to counter it. We’ll need to get acquainted with the Islamic State’s intellectual genealogy if we are to react in a way that will not strengthen it, but instead help it self-immolate in its own excessive zeal.
One of the more frightening aspects of the ideology of ISIS is the belief that the events of today are moving us closer to an apocalyptic end game.
After its battle in Dabiq, Cerantonio said, the caliphate will expand and sack Istanbul. Some believe it will then cover the entire Earth, but Cerantonio suggested its tide may never reach beyond the Bosporus. An anti-Messiah, known in Muslim apocalyptic literature as Dajjal, will come from the Khorasan region of eastern Iran and kill a vast number of the caliphate’s fighters, until just 5,000 remain, cornered in Jerusalem. Just as Dajjal prepares to finish them off, Jesus—the second-most-revered prophet in Islam—will return to Earth, spear Dajjal, and lead the Muslims to victory.
“Only God knows” whether the Islamic State’s armies are the ones foretold, Cerantonio said. But he is hopeful. “The Prophet said that one sign of the imminent arrival of the End of Days is that people will for a long while stop talking about the End of Days,” he said. “If you go to the mosques now, you’ll find the preachers are silent about this subject.” On this theory, even setbacks dealt to the Islamic State mean nothing, since God has preordained the near-destruction of his people anyway. The Islamic State has its best and worst days ahead of it.
As we’ve witnessed with cults, people who believe the end times are near are not going to behave in a rational manner. Wood also compares certain aspects of the fanaticism of ISIS to the Khmer Rouge. These similarities are not going to provide comfort to those who would rather just wish the threat of ISIS away. In fact, they should scare the hell out of us.