For Muslims this is a religious war
While we may go on denying it, for Muslims this is a religious war. And what better target for terror, than an infidel's religious event?
The clergy at interfaith conferences may yammer on about how we're all the children of god, but Muslims know better. They are the slaves of Allah and we are heretics and idol worshipers. It's their duty to fight us, until we submit and accept Muslim rule. The more we resist, the more they're obligated to kill us until we give in and there's a mosque on every corner and the Koran replaces the Constitution. It's a religious duty for a Muslim to make the Way of Allah triumphant all across the globe. To Muslims, this is a sacred duty and a way of life, that is not a detail, but the heart of the Koran.
Unlike Christians and Jews, the Islamic holy texts are not a complicated structure that takes place across a swath of history-- but an enormously simple one dominated by a relatively brief period and a single categorical imperative, to expand, dominate and rule. For the Muslim, life is complicated, but Islam is simple. And even the most secular and westernized Muslim will sooner or later feel an imperative to escape from the complications of modern life, into the pure simplicity of Islam. The media charges that such escapees misunderstand Islam, but in actuality they understand it quite well. It is a reversion to the barbaric, an Islamic narrative that sweeps aside the complexities of civilization and personal choice for something more elemental.
Goggling when university grads, doctors and other high end professionals suddenly embrace their "Inner Mohammed" and go on killing sprees is foolish. Modernity for the Muslim is a sham inflicted by colonialism and globalism on his own country and multiculturalism when he's abroad in the West. It is not the natural product of his own advancements, and no matter how often he's told that his people invented everything from telescopes to planes, it's always a poor fit.
Civilization is not something the Muslim invented, but something that was forced on him in defiance of his law, his culture and his traditions. And if he does everything in his power to bring it down in ashes, to burn, loot and rape his way across the continent, and every continent that was foolish enough to allow him entry in the hopes that he would be a good citizen and a worthwhile member of society, then its governments have more of the blame than he does.