It seems to me Eleizer has arrived at a line of arguing that mirrors buddhusm and other similar systems. People are attached to certain ideas, concepts, beliefsystems etc, and when two opposing ideas clash together the result is killing, and a destructive spiral. The challenge is to transcend the situation, by being able to keep the mind cold when the rest of society goes amok. Unfortunately while scientists are good at discribing a situation, when it comes to giving normative advice they are mostly useless.
Another thing, faith is so often brought up as a reason for war and massmurder. Equally important imo are other caracteristics of the human psyche like fear, frustration, humiliation and hatred. Just consider why do (or did) so many americans support the senseless attacs on Afganistan and Irak? I would say more beacause they are scared shitless that some arabs might blow up their neighborhod rather than their blind belief in their leader.