The MIB
I've been rewatching Lost over the past few weeks for like the hundredth time. One thing that always bothered me is why was Jacob so against the MIB leaving the island? the big plan was for him to sink the island and leave, but once the island was sunk the MIB would have lost his powers and became a normal man. Surely, he couldn't do much damage living in a normal society, he will probably spend that time loving life not spreading misery and death.
When Jacob was giving his speech to the few candidates left, he said everyone you know and love will die if he leaves, surely, he's been a tad dramatic here?
What am I missing here?