Now that the survivors of Oceanic Flight 815 are off the island, everyone is starting to die. Ben said that Jack was making a mistake and that every living person on the island would die if he made that call. Well, maybe everyone is dieing. The death that Jack attended was of someone from the island. He is so upset and depressed because he knew the decision he made to get everyone off the island is killing all the survivors. He feels responsible. Kate is in denial that this is true. Jack thinks if he takes everyone back to the island, he can still save people.

That is why Noami said they found the plane. The Island didn't want the suvivors to be looked for. It was their destiny to be on that island. And now that they are off, they are all dieing.