A number of factors here muck:
If the target is a military one, then I'm afraid that this is the horror of war. We cannot expect them to fight to our strong suits.
What made me despise these people are the civilian targets they often choose, be they young people in nightclubs or even worse the Red Cross station in Iraq.
But let me put it another way. If you know or think you know that as soon as you detonate yourself, you will either be reincarnated, or go to heaven where there are 70 virgins waiting for you, is it really brave to pull the trigger, or are you taking the cowards way to easy street?
The survival instinct is probably the most deeply ingrained instinct we have, probably only second to a mother's instinct to protect her young. The brainwashing involved to override the survival instinct must be phenomenal.
Certainly, Medieval Japanese culture, as refined as it was, was also utterly brutal. Samurai would use convicted criminals to 'test the sharpness of their swords' and just chop them to bits. Often, the bodies were sewn back together again so they could repeat the exercise. For peasants, survival depended on the whim of their masters.
We saw signs of this brutality again in the Second World War where the Japanese used Burmese babies for bayonet practice. I cannot tell you how much they were hated by the Malaysians (where I am originally from) even long after the war ended for the atrocities they committed during their occupation. But for every horror story there is also another side of the coin.
My dad was about 10 years old when the Japanese invaded Malaysia. Fearing that the Aussies and the Brits would make a last stand in Kuala Lumpur and there would be a huge fire-fight, the civilian population fled to the jungle. My dad forgot his favourite book and went back home to get it, only to run into a Japanese officer. Japanese officer put my dad in his jeep, drove him to the department store in the centre of town (which was deserted) and told him to take his pick of the wares in the store and then drove him back to the house and let him go.
Ravs