I hope the traveler is evil would make sense. Other than the fact that there were massive internal issues within bungie regarding the story. http://kotaku.com/the-messy-true-story-behind-the-making-of-destiny-1737556731 The fact is we do things like killing groups of mobs and have no idea why, and they seem to be peaceful except we destroy them all with no explanation as to why we are. The kabal, I mean, poor guys, we kill them for no other reason than they are in the way. Also a final comment, dont try and look too deep into the lore or story there is none, you're wasting your time. Bungie are making things up as they go, and trying to patch massive holes in the non existent story.