Can Jacob Be Killed?

The last thing we hear is John Locke telling Ben that he is going to kill Jacob.



Here's my thought on this.



Jacob, like Richard Alpert, is very very old. They may even have arrived onto the island at the same time. Possibly on the Black Rock, maybe even earlier.
I think Jacob is good and that he may have been the original leader of the Others, but Richard staged a coup and chose a "puppet" leader, ruling the Others via proxy as the Advisor.

The ash circle around Jacob's cabin is not to keep people OUT but to keep Jacob IN.

I have suspected this since the first time his name was mentioned and when Ben said only he or Richard have ever seen him. When Locke heard Jacob's cry for help Ben knew he had to act and shot John, leaving him to die in the Dharma Death Pit. But the island healed him because it needs John.

Richard and Ben have been perpetrating an elaborate hoax, ala King John, by locking away the true leader and ruling in his stead, following his own agenda but claiming it is decreed by the real king. Richard and Ben have realized that John Locke will be their downfall, which is why Ben keeps trying to kill him. Ben did not know that the island would revive John and imbue him with such confidence, purpose and knowledge.

I believe the only reason Ben boarded the Ajira 316 flight was to return to the island and resume his leadership of the Others. Seeing the new and improved John Locke is causing both Richard and Ben to fear. How is it that Richard was not aware of John's return to the island? And Ben admitted that the island never told him anything and came perilously close to admitting to never seeing Jacob.

John Locke in NOT going to kill Jacob but is going to kill the myth of Jacob. He is going to pull back the curtain and reveal the deceit and lies that Richard and Ben have been telling to everyone for so many years. They have been using Jacob's name as an instrument of fear to keep their people in line.