So why does terrorism happen? Not because terrorists are "evil," but because of deficiency in their knowledge about what they can, and what they cannot, know. Among things they definitely cannot know is whether Koran is the word of God or not, and whether Mohammed was a prophet or not. If we clear out that mistake from their mind, what would remain of their selfless zeal? Would they kill on behest of what merely may, or may not be, God's word? Would they die for a promise that merely may, or may not, come about?