Abu Arak
I believe Abu Arak has confused killing with the protection of one's own state. Israeli soldiers are not order to kill Palestinians, if they were, then there would be few Palestinians left. They are ordered to stop those who act in terroristic ways, those that are there to harm the Israelis.
This falls under the basic policing power that all legitimate countries have. Israel has a duty to protect it's people, this means that having to execute those that mean harm in such ways are appropiate. This is not murder, it is defense of the state. When you attack the people of a state, you attack the state itself. When you attack the state itself, the state must protect itself or perish. Therefore, these people act in self-defense.
Self defense is not murder. You are not a "killer" if you commit self defense. It is only natural to do such. When you are attacked, it is your basic right to protect yourself.
Murder itself is fundamentally wrong, it denies those of the basic rights given to all humans. However, once murder is commited, the basic rights are stripped away. Here in lies why the Israelis are ethically correct.
Now about there being peace, it will not happen any time soon. I am sure that Pakistan and India (another British doing) wuld probably fix itself far easier than this.