I understand why some are willing to die to save many lives. Such men are heroes. But i've often wondered what drives some to commit suicide in order to kill many. I found some clues in reading the Koran, which speaks of men who die for Allah as having endless sex in paradise with their own personal harem.
I recently saw on TV (NGC) that 98% of the men who volunteer or are drafted into the army (From World War II and upwards), can not put theirself to kill others. They shoot, give supporting fire and fullfil other important tasks such as resupplying but they would never dare kill another human being. They referred to these people as
sheepThere is 1% which may be perfectly sane during his civilian life, but will become a downright psychopath during a battle situation
Then there is the last remaining 1% who are able to kill, but do not do so because they have gone beserk. They do so simply to protect their beloved ones and ideals. These people were refered to as
sheepherders.
I think that blowing up others is rather uncompassionate and an act of cowardice. Therefore, you will probably find no justification regarding the acts of these men in the Hagakure.
The hagakure is strongly influenced by Buddhism, the Koran is not.