I know, naomi, they are so (I hesitate to say brainwashed) convinced that this is the most heroic thing that they can do in "defence" of their faith - and IMO this is due to Koranic wording being taken out of context, or interpreted to suit their intentions, the assurance they will have immediate Paradise... I'm sure they can quote chapter and surah, as you say! Howver - the religion of peace and submission just doesn't square with that for me.
So much war and suffering, all in the name of religion.... whichever one the warring sides are supporting - if only they realised how much they all have in common, if some of them bothered to look.