The opening scene of the 5th season finale made it obvious that Jacob is good, and the man wearing black is bad. But what if its the other way around? We dont know much about Jacob, maybe he's the bad guy and Nemesis is saving everyone by destroying him. The writers of Lost love to have messages and such within the thread of the story. Maybe they're going for a "the world isn't so black and white" thing. There's a lot more to life than just "Good" and "bad." Just an idea. What are your thoughts?