Caught a chunk of NPR where they had interviewed a guy who wrote a book about the history of Al Queda, the Taliban, and Osama Bin Laden. (Sorry I can't get more specific: Can't find a mention of the program on their site, and when I'm driving, I tend to focus more on not dying, not getting dents, and making it home. Roughly in that order.)
Anyway, he mentioned a number of Muslim attacks against Soviet occupation that did almost nothing: The Muslim combatants tended to charge straight in and get killed unnecessarily. Why? 'Cuz that's how a Jihadist gets into Heaven.
That's one reason a lot of cases of religious martyrdom and many cases of self-"sacrifice" by people who make a big deal about the afterlife don't really mean much to me: They're getting something out of the deal. I don't know about the accuracy of the above tale, but it demonstrates the problem of basing morality on a simple reward/punishment scheme: Quickly dying in a manner that superficially looks "moral" is the quickest way to selfish, eternal bliss, even if it hurts those left behind.