Religions that focus on eschatology, which BTW includes the whole Judeo-Christian-Islamic tradition, tend to be much more focussed on what happens in the afterlife than in the current life. As a result, such true believers have little problem with martyrdom and the effects on the living of other actions that they may take in this world, as long as those actions do not hinder the actors' chances of achieving a better state in their afterlives. For example, I heard a minister say, post 9-11, that he was not really concerned about the increased danger of flying--he viewed it as a blessing because he might die sooner and, therefore, be reunited with God sooner. He said he had no fear of death since death brought a greater reward for him. He also had no real concern with the impact of his plane crashing on the other passengers and those who might be in the path of the debris.

I think it is probably pretty hard to engage in a rational argument with those who hold ardently to such beliefs about the impact of one's actions in the here and now on the folks who continue to live on after that person goes to his/her "reward."