Where, in the Koran does it say anything about 72 virgins? Nowhere, actually. And I'm also pretty sure there's nothing about blowing up civilians and children.
http://www.straightdope.com/columns/read/2329/does-the-koran-really-promise-islamic-martyrs-72-virgins
If the US had invested a few of those billions spent on ammo to develop an alternate fuel source, they would not be "over there" looking our for their oil interests, and "over there" would not be full of US (and other countries') money. While a "martyr" willing to blow himself up for 72 virgins*, the dynamite, guns, ammo, cellphones, apartments, training grounds, food -- on and on and on -- are quite expensive. If not for the West's reliance on middle-east oil, I'm sure there would still be fighting down there, but it would be done with sticks and stones.
* Really, virgins? I don't want to be crude, but wouldn't you prefer one or two virgins just for the novelty, and 70 or so really, really experienced women?