Scott Atran in This View of Life:
Sam Harris posted a recent blog about my views on Jihadis that is unbecoming of serious intellectual debate, if not ugly. He claims that I told him following a “preening and delusional lecture” that “no one [connected with suicide bombing] believes in paradise.” What I actually said to him (as I have to many others) was exactly what every leader of a jihadi group I interviewed told me, namely, that anyone seeking to become a martyr in order to obtain virgins in paradise would be rejected outright. I also said (and have written several articles and a book laying out the evidence) that although ideology is important, the best predictor (in the sense of a regression analysis) of willingness to commit an act of jihadi violence is if one belongs to an action-oriented social network, such as a neighborhood help group or even a sports team (see Atran, TALKING TO THE ENEMY, Penguin, 2010).
Harris’s views on religion ignore the considerable progress in cognitive studies on the subject over the last two decades, which show that core religious beliefs do not have fixed propositional content (Atran & Norenzayan, “Religion’s Evolutionary Landscape,” BEHAVIORAL AND BRAIN SCIENCES, 2004). Indeed, religious beliefs, in being absurd (whether or not they are recognized as such), cannot even be processed as comprehensible because their semantic content is contradictory (for example, a bodiless but physically powerful and sentient being, a deity that is one in three, etc). It is precisely the ineffable nature of core religious beliefs that accounts, in part, for their social and political adaptability over time in helping to bond and sustain groups (Atran & Ginges, “Religious and Sacred Imperatives in Human Conflict,” SCIENCE, 2012). In fact, it is the ecstasy-provoking rituals that Harris describes as being associated with such beliefs which renders them immune to the logical and empirical scrutiny that ordinarily accompanies belief verification (see Atran & Henrich, “The Evolution of Religion,” BIOLOGICAL THEORY, 2010).
More here.