"What is more, because God sees everything that is predestined, he KNOWS they will Fall"
Farady should have said: "What will happen, happened."
"You might say that God involves Man in a very long con."
That is what MIB is saying: There's nothing to save. And, if we go by the producers' words that we may not know who is really good, really evil, it seems that the story will play with this idea.
Consider that the characters became Losties when they reached Jacob's island, that they seem happier in a world without Jacob and the message may not please some.
And, if there are still doubters as to which one is which, XLocke said that he would have told Richard why he was asking him to do things, he would have given him knowledge.