We as humans know when we have done wrong. Most of us are aware of judicial system, if not the Ten Commandments. Movies and television may portray terrible people, but that is why it's called the "movies." We are told all through life what is right and wrong, good and bad, we all know the difference. We all make mistakes, but to take a life is more than a mistake.
Are some murders justified? Yes, I believe they are. There are instances of self defense or protecting the lives of others, where I believe murder is justified. When it comes to your life or theirs, the choice seems simple, your own life. I also believe that murder, in the form of capital punishment, is justified. If someone was willing to take another human beings life in cold blood, premeditated murder, that individual doesn't deserve to live. Capital punishment should only be carried out when there was no doubt the person committed the murder,, and it was premeditated; unlike instances of self defense. It seems that most people who kill don't have any reason not to. The penal system isn't allowed to lock the people up indefinitely and capital punishment (execution) isn't carried out very often. .
War? This is a concept that I am somewhat familiar with, not hat I have been in battle, but I was is the military and activated for Desert Storm/Desert Shield. When your go in the Army everyone goes through basic training. We are all taught that same thing; How To Be A Soldier. You are given an M16 and told it was your "friend". Well for many people I know that became reality. Many reservist were called up to fight during the Gulf War and had to use their "friend." Most of them never thought they would have to use the M16, let alone, every be in a combat situation. This did become a reality. It seems to come down to kill or be killed. The United States become involved to help the Helpless. The "enemy" was fully aware of the power of the U.