So is Nathan Drake justified in what he does? Does the context of his universe (read: treasure hunting) justify him killing as many people as he does in the Uncharted games? Look how many bandits you kill in Borderlands. How many human beings you kill in Fallout or Elder Scrolls. And for what purpose? Does that purpose, justify the murder of all of those people within the game's context?
You can argue all day whether or not character is justified in their actions or not. Afterall, it's just fiction. It's make believe. It's not real. So perhaps the entire discussion, altogether is silly. Hmmm?
People don't want this particular game to get attention but you guys talking about it is doing just that. If you really dislike this sort of stuff, I suggest just keeping your mouth shut, ignore it and not give it the attention you claim it doesn't deserve.