i see what your gettin at and i kinda agree with you, but if thats true im thinkin its less of them actually being killed because they arent on the island, and more of them dying because everyone dies, as it is the natural course of life and they will all die eventually. kinda like the island is their own paradise, their Garden of Eden, and once they left they cant go back. staying there would have saved them from the evils of their lives, possibly.