bla bla bla sappling...You write too much and think too little I'm afraid.
Of course I've played Duke Nukem (btw I made it in the hardest level, so you can see I do play that kind of games), Quake (idem), Unreal Tournament and maybe some other ones.
Yeah, they are cool, you destroy everything you see and it's Ok, the more you kill, the funnier. WHY? because it is an action game!!!!! It's about leaving no one alive. Unrealistic? sure, who cares?
Now, this game is called CIVILIZATION. The whole idea of this is to DEVELOPE YOUR CIV. And I personally think that intentionally starving your citizens shouldn't help much

. This game is intended to be about constructing, but in the end it tends to be about destructing everything you don't own, and somethings you own but bother you, such as unhappy citizens...well, that sounds just like the opposite of civilizating (think I'm inventing the word) the world.
Now do you see our point?? Carnage is great for Quake Arena, but not for Civ III. Well, of course it's OK if you can become some kind of Stalin, conquer the world and kill anyone you dislike, but this should have its costs. However, the way the game is set, it seems to be the the best (if not the only) way