So, uh, what the heck is this "rapture" thing, anyways?
Let's start with the broad strokes. One of the basic ideas in Christianity is that Christ, having ascended into Heaven after the Resurrection, will return at the end of time, render final judgement on all souls living and dead and usher them to their eternal reward/punishment as appropriate. Simple enough, right? But there's one thing you need to understand about Christianity, and that's that Jesus said, "Okay guys, I'm off, see you soon, Peter's in charge until I get back," and nobody has agreed on anything since. The devil, as ever, is in the details.
For the majority of Christians (both historically and currently), the Second Coming (the return of Christ to Earth) and the Last Judgement (the ultimate rendering of justice on the world) are one and the same, and will happen at some unknown and unknowable future time--we can prepare ourselves for it (indeed, this is one of the purposes of the Advent season), but we cannot predict its time or nature. But starting around the 18th century, some American theologians started having different ideas. These ideas were based on two specific passages from the Bible, the first being Matthew 24: 37-41:
As it was in the days of Noah, so it will be at the coming of the Son of Man. For in the days before the flood, people were eating and drinking, marrying and giving in marriage, up to the day Noah entered the ark; and they knew nothing about what would happen until the flood came and took them all away. That is how it will be at the coming of the Son of Man. Two men will be in the field; one will be taken and the other left. Two women will be grinding with a hand mill; one will be taken and the other left.
The second is from Paul's first letter to the Thessalonians, 4: 16-17
For the Lord himself will come down from heaven, with a loud command, with the voice of the archangel and with the trumpet call of God, and the dead in Christ will rise first. After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever.
Now, these theologians assumed both of these passages meant that the faithful Christians of the world would literally be taken up into Heaven ahead of the Last Judgement. This "rapture" would occur instantaneously, and would precede a time of "tribulation" where the Antichrist and his buddies ran rampant before the Second Coming. Some further concluded that they could determine the timing of this rapture based on certain events/time frames given in Scripture. The restoration of Israel is a big one here, which is why you have a lot of Evangelicals coming out on the side of the country--they don't really care about Jewish autonomy or self-governance, they just think the state needs to be in place for the End Times.
TL;DR: Some American Protestants took a couple passages that were almost certainly symbolic/allegorical and translated from a different language and culture way too literally, and as a result we have the Left Behind series and bumper stickers that say "In case of rapture, this care will be unmanned."













