Mortimer B. Zuckerman:
Suicide bombing came to Israel in 1993, then moved around the world, eroding the trust necessary for ordinary people to leave civilized lives, so that taking commuter trains in Madrid, planes in Washington, and buses in Jerusalem now confronts us as cause for dread.
http://www.usnews.com/usnews/issue/040614/opinion/14edit.htm

It is a war on western culture by people radicalized by a new breed of fanatical Islamic preachers. They spread their religious gunpowder through satellite TV channels, their hate-filled sermons often delivered from the safety of western cities.

But America, as the world's lone superpower, has become the common enemy of Muslim militants, in a war that is not about our foreign policy or about global inequities, or even about what we do. It is a war because of who we are--and it may well go on for decades.