It's also not talking about killing during battle.
OK, maybe that's why Jesus fixed it with the sword?
Matthew 26:52 Then Jesus said to him, "Put your sword back into its place; for all those who take up the sword shall perish by the sword"
I'm not really into bible (and religion) as such, but what I understood when read the bible is that god made man by his own image and to kill the man would equal to disfiguring god's image.
Kinda like when I read second amendment. Says "A well regulated militia being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed". Means to me every state can have militia and that I can own guns. Some smarties always find deeper and different meaning.
Anyways, how's with those not religious or members of other religions or people with different moral values, does bible still applies? Or can they disagree with it as long as they don't break the law?