I think of killing another person like so:
Have you ever had a family member pass away? Murdered? Hurt or Disabled in a serious manner?
If you have, think back to the time when it happened, the feelings coming towards you, the despair before the eventual acceptance that what has happened cannot be changed and you have to deal with it in your own terms.
You are simply bringing about this same, often horrible, feeling onto another innocent person whome you do not know or have any connection with in any way by killing or seriously harming another human being.
Animals have emotions as well but we cannot feel them to the extent that we do with other Human Beings. It's just a species differnce type thing. You can't hear a dog pouring its heart out or feel what it felt when it loses a member of its 'pack' or 'family' ...
Killing in the name of revenge is irrational at times, in my opinion, because you will only cause the same exact feeling to be brought about back towards yourself from the group which you attack.
It begins an endless cycle of revenge/regret/anger/depression that can only stop when one party accepts what has happened and tries to show the attacking party the error of their ways, as well as your own (This is very important).
Even then, some people simply won't accept this.
Example: The worst thing that I've witnessed was the aftermath of a suicide bombing which had killed my grandfather. Walking into the room, headless corpse on the floor, bits of brain on the roof and blood everywhere. Single-handedly the worst thing I've ever experienced. Not going into details of what my parents had gone through.
Initial feeling? Well they caught one of the accomplices, they locked him up and all I wanted to do was to go down there with my brass-knuckles and make his face unrecognizable from a beating that would last him the rest of his life.
What would be worse? Finding a family member of theirs and murdering them... Maybe blinding him with a knife?
Horrible, horrible, sick thoughts ran through my mind that day.
But would it have been worth it in the end? Not at all.
I would have ended up demonizing my image, and creating a habit of taking revenge on those who wrong me which would last me the rest of my life.
I rather focused on remembering the good lessons my grandfather had tought me in his wise-years... RIP
Why kill somebody? In the end, the negatives far outweigh the benefits... The best one can do is open anothers mind with lessons and try to pin-point exactly why a person did what they did. It will almost always end up with radical non-sense that could have been dealt with in another fasion which would be beneficial to both parties...
What did I see in this regard? Well if I had the chance to speak to a Taliban suicide bomber, I would try to find out what led them to that point in their life? Is it for a religious cause? How could killing those of his own religious beliefs be positive for this cause? Has it been positive at all or has it only led to negative tensions for the greater cause which he is willing to give his life for? Would the people who convinced them to become a suicide-bomber do the same action in a heartbeat? If not, why? Why beyond that, let the person ponder on the deep rooted reasons as to why a person in a high-up position has the right to decide who lives and who dies?
In that same sense, is it not God which should decide who lives and who dies? Does the Taliban Bomber not believe that anyone playing or imitating god deserves death and a sentance to hell? Is he not playing god by deciding which innocent lives to kill? At this point he may answer it is god's will that _insertperson_ deserved to die, but I would respond that it is not god that is pulling the trigger but you, you have the choice of doing it or not doing it, therefore you are playing god and are being hypocritical to your own beliefs.
Is he lost and needs a new path to show his beliefs in a way that is positive for both the preaching & recieving end?
At this point extreme therapy and care with a good & open environment would be necessary...
You can go into extreme details and really break somebody down if you have the oppurtunity, but first you must get them to break into their own psyche and find any rational way of thinking to expose and bring about them... But this is often one of the most difficult things for anyone to do.
I often wonder if something such as MDMA for interrogating hard-line terrorist extremists would be a good way to reform them into better people to actually change their way...
Until people actually feel extreme despair to extreme regret for their actions by feeling it from the ones they have hurt, they will never change their ways...
MDMA is a key in my opinion... But this is another discussion
In the end, killing is a very very last resort, it is also the worst choice anyone can make so they have to think long and hard on why they do it... The best thing to do is understand why you do it, understand why they do it, and each party could come to a conclusion that would not resort to killing...
If a person doesn't know why another should die, and why they themselves have to do it, I would argue that they have no sense of empathy (As I read in a previous post) and that they may continue feeling less & less empathy the more they do it.
^Could that be the reason for the soldiers in Afghanistan who are now showing up as killing Civilians for sport? You do it once, you do it twice, hell you will do it just for the rush by then... Sounds like a drug-addiction to me... Sounds like a form of escapism from reality... Until you hit rock bottom and break down...