These people already has no regards for humanity, i don't see why they should be given the rights of a normal human beings.
Are they doing it out of desperation? Are they doing it because they need to feed their family? Are they doing it so the world will become a better place?
They are doing it because their 'sick' leader is telling them to do so, to conduct multiple bombings against innocent victims. While wishing to be judged like a saint and given a reward for killing the innocent... what kinda sick brain will actually believe this??
I have the same thoughts for people who start Wars for power, if I could choose, all of them should be put to death.