How do rapture theories differ from "endure unto the end" of such cloud-y confusion?

It will be indescribable ... science would not be able to find out a logical explanation for it .... then a lie of deception will come UFO'S ..... since those left behind know that its was written in the Bible some will come to their senses.. but there will ne a man ( the antichrist ) who will say he has the answer... ufo's, because that will be the only scientific explanation for it