Comment by danbruc
Because you were only talking about martyrdom and suicide bombing which is a choice of weapon, there is not a single word relating to choice of target in your comment. One could maybe see some implicit hint at the choice of target as suicide bombings are most effective and mostly used for a specific kind of targets and they are often pretty indiscriminate attacks. But as you can target more or less the same targets with non-suicide bombings as with suicide bombings and you were specifically talking about suicide bombings and not bombings in general, this is not something that you should expect people to take away from your comment.
By the way, I am not sure you understood necessity in the way I wanted it understood. I wanted to say what if they target civilians because they do not have the means to effectively target the military, i.e. if it is necessary to target civilians in order to have any impact at all. And you can target civilians in various ways, so martyrdom and suicide bombings are not necessary. It is, I would assume, however true that martyrdom and certain religious views about an afterlife make suicide bombings a much more viable weapon than otherwise.
viable is defined as capable of doing something successfully - is there success on the side of suicide bombers? destroying lives and taking the region into the dark ages - is that success?