I was replying to your "just suppose".
I think people can be deranged by hate, but I don't really think that most of the people who are suicide bombers are acting while having been drugged, or somehow not in possession of all of their faculties. In fact, that never occurred to me until you mentioned it.
So, if people are being doped up and sent out to kill themselves while in a drug-induced delusion, would shooting them except to stop the detonation of the bomb be less acceptable? And how would you know?
Or is what you suggest something like the Patti Hearst defense, of someone who has been brainwashed by a cult? Why does it work for a rich American girl and not a poor Palestinian boy? Just asking, since you brought it up.