The self-labeled Islamic State has always been a mystery to Americans. The group has built itself into a vicious warfighting machine, but from the beginning, the joy its fighters take in beheading hostages, prisoners, and captured civilians has been incomprehensible. Do the group's leaders and fighters have no sense of pity, or of mercy? Do they not see that they and their own families might also become victims of some other group - their wives enslaved, their children stolen? As is the case in analyzing any human behavior, one must begin by understanding the Islamic State, or ISIS, as its leaders and fighters understand themselves.
Looking back
A year after ISIS emerged out of the chaos of Syria's civil war, some perspective is possible. ISIS is basically new wine in an old bottle. Its savagery issues from an apocalyptic "End of Days" mentality - a self-righteous belief in one's own truth combined with a ferocious will to power. ISIS conceives its struggle as a historic fight of Truth against Error; in this case, their version of Islam, pitted against the world. The Islamic State's first enemies are, unexpectedly, not the United States or even Israel. Theirs is a war against other Muslim sects for total absorption. Sunnis who resist (including al Qaeda), and all Shiite Muslims, are their primary target, with Iran obviously first of all. They care nothing for the rules of war, whether those be informal historic codes, or norms codified in international law.
War is always hell, but war properly defined is waged with a sense of limits - goals and methods of fighting. War is a "civilized" human activity in the sense that it is common in human history, it is fought within constraints, and combatants wage war with the goal of achieving peace, whether that be in victory, defeat, or sometimes mutual exhaustion. Annihilating the enemy is not a goal of war properly defined. Civilized war defines honorable and dishonorable ideas of combat. For example, don't harm prisoners of war, and, today, don't use weapons of mass destruction. Against this background, the Islamic State straddles the boundary between war and barbarism.
As a movement with a plan for organizing a redeemed, perfected society, the Islamic State offers just the latest form of totalitarianism, and as with each previous version, it finds its own justification. Earlier forms included Nazism, based on the idea of a master race, and Communism, based on the idea of a historically predestined social class, the Proletariat. The Islamic State uses religion to justify its totalitarianism. Genocide, which is not war but a massacre of innocents, can be the methodical work of a totalitarian state (the Jews massacred by the Third Reich) or it can come of ethnic or religious hatred that erupts in an orgy of bloodletting (Rwanda in 1994). Examples of savagery used as a method of battle include the practices of Attila the Hun and Genghis Khan, or of some groups in Africa during the blood-diamond years, and of Boko Haram today.
Unleashing hell for the sake of utopia
The ideology of a perfected society is also nothing new. The Islamic State's "caliphate," headed by a caliph (Abu Bakr al-Baghdadi, who in 2014 proclaimed himself "Caliph Ibrahim," i.e. Caliph Abraham), is based on an idea that reaches a long way back. The caliphate was an essential feature of Islamic empire, beginning with the Prophet Mohammed's successors in the 7thth century. Muslim caliphs were never so powerful as Hitler or Stalin, neither within their own government nor across national boundaries. The last caliphate, based in the Ottoman capital of Istanbul, was abolished by the secular Kemal Ataturk in 1924 after he declared the Turkish Republic. The caliph is a lesser figure compared to the major historical prophets of "religions of the book:" Abraham, Moses, Jesus, and Mohammed. In other words, Baghdadi doesn't claim the stature of Mohammed. Other would-be prophets have done so. In the mid-19thth century alone there was the Muslim Mahdi in Sudan and the benevolent Muslim Persian Bahai prophet Bahaullah. The Chinese Taiping Rebellion's leader from 1850-1864, Hong Xiuquan, claimed to be Jesus's younger brother. ISIS is only the latest version of a historically recurring pattern. It manifests a familiar human desire for transcendence and personal holiness. If it were local and peaceful no one would object, so long as it respected the rights and security of others.
ISIS of course does the opposite. But it's not true, as many Americans have assumed, that beheadings, crucifixions, and other horrors perpetrated by ISIS fighters are simply barbaric behavior, the actions of young men plumbing the depths of human nature's dark side. In Islamic State's ideology, savagery is authorized, glorified, indeed blessed by Allah.
Between Reason and Savagery
The first ISIS justification is revenge: avenging modern Islam's victimization by outside European powers in the 19th and 20th centuries. British and French imperialists, with Russia's assent, took the Allied victory in World War I as their chance to carve up the defeated Ottoman Empire's Arab Muslim areas on the basis of the secret 1916 Sykes-Picot agreement, setting out post-World War I spheres of influence (i.e. creating British predominance in the new Iraq and Jordan, and French predominance in Syria and Lebanon). ISIS' s version of this history is accurate, and it explains why obliterating the border between Syria and Iraq was their first geopolitical goal.