well, because if you could gain the upper hand for your own survival and they couldn't, they're of lesser physical or mental ability.
Please could you explain more fully the scenario you envisage?
Eh. Nothing in particular. How about.. guy walks up to other guy with gun. Plans to shoot. That work? Could've easily been me the guy walked up to.
and Modus: If a "paradise" afterlife does exist, wouldn't it make sense for people who want the option to rest eternally to have that option? Let's not really get into religion, though. This isn't an argument, or a debate, or anything. Just a what if. Curiosity.