Why shouldn't Christians kill?
Well that whole 6th (5th?) commandment gets in the way sometimes.
Thou shalt not kill
Of course, most of the Christian religion is based around the theme of, "Do as I say, not as I do." But since that is also one of the fundamental parenting techniques we use to raise kids in the States, it shouldn't come as a suprise that it is widely accepted.
Wow, do you realize that you've just confirmed the stereo type that women have absolutely no sense of logic?
Do you realize that such a horribly gross, over-reaching generalization nullified the ability of any credible person to take anything you said in the rest of your comment seriously?
The brain is a wonderful organ; it starts working the moment you get up in the morning, and does not stop until you get to work.