Oh yes. Good and evil are entirely subjective. However, when anyone tries to accomplish their goals by committing mass genocide (Hitler, etc.), they are typically depicted as evil. Sure, they may have good intentions, but intentions mean little when your actions speak louder. So would I condemn a person that would kill to survive? No. Would I condemn one who choose to kill to survive when other options were clearly there? Including peaceful and mutually beneficial ones? Yes. You bet your sweet ass I would. In other words, (I feel we are mostly talking about the Fallen) the Fallen were able to approach us peacefully, to share the light of the Traveller, to unite against the Darkness that has nearly wiped us both into extinction. Instead? They plunder and pillage our lands, raid our city, and pirate our ships. Good guys? Full of grace and love? Unlikely.