Alright... I don't know why most people assume that jacob is on one side and Black Shirt Guy is on the other. When lost first started, and continued into season three, The Others were "bad" and Jacob was the leader of The Others which also made him "bad". But in season 5, we hear Black Shirt Guy say to Jacob, "do you have any idea how badly i want to kill you?" This made people think that Jacob and Black Shirt Guy were on different sides.. (good and bad)But we don't really know that. I think that its possible that Jacob and Black Shirt might both be "bad" but just still don't have the same outlook or ideas on things. Does this make any sense? Does anyone agree?
-this isn't meant to tell people they are wrong for thinkng something else, i just have my opinion.