Good/Evil is a human concept and what actions fall into each category change with time and culture and from person to person. Just try this thought exercise: What is the difference between a Murderer and a Soldier? Or why is it when you kill a dozen people you are called a murderer but if you kill 1,000+ your a conquerer? What's the diference between a Pirate and a Privateer? There is no absolute Good or Evil.