Judaism and its offspring, Christianity - though heavily involved in political affairs throughout the ages - have kept their dignified distance from such carnal matters. These are religions of "heaven" as opposed to Islam, a practical, pragmatic, hands-on, ubiquitous, "earthly" creed.
Secular religions - Democratic Liberalism, Communism, Fascism, Nazism, Socialism and other isms - are more akin to Islam than to, let's say, Buddhism. They are universal, prescriptive, and total. They provide recipes, rules, and norms regarding every aspect of existence - individual, social, cultural, moral, economic, political, military, and philosophical.
At the end of the Cold War, Democratic Liberalism stood triumphant over the fresh graves of its ideological opponents. They have all been eradicated. This precipitated Fukuyama's premature diagnosis (the End of History). But one state ideology, one bitter rival, one implacable opponent, one contestant for world domination, one antithesis remained - Islam.
The same can be said about Democratic Liberalism. Like Islam, it does not hesitate to exercise force, is missionary, colonizing, and regards itself as a monopolist of the "truth" and of "universal values". Its antagonists are invariably portrayed as depraved, primitive, and below par.
Such mutually exclusive claims were bound to lead to an all-out conflict sooner or later. The "War on Terrorism" is only the latest round in a millennium-old war between Islam and other "world systems".
- Don't you see any difference between terrorists who murder civilians and regular armies in battle?
Both regulars and irregulars slaughter civilians as a matter of course. "Collateral damage" is the main outcome of modern, total warfare - and of low intensity conflicts alike.
There is a major difference between terrorists and soldiers, though:
Terrorists make carnage of noncombatants their main tactic - while regular armies rarely do. Such conduct is criminal and deplorable, whoever the perpetrator.
But what about the killing of combatants in battle? How should we judge the slaying of soldiers by terrorists in combat?
Terrorists are trust-busters: they, too, want to kill, torture, and incarcerate. They seek to break the death cartel of governments by joining its ranks.
Thus, when a soldier kills terrorists and ("inadvertently") civilians (as "collateral damage") - it is considered above board. But when the terrorist decimates the very same soldier - he is decried as an outlaw.