Looking to the future: The Terminator movies and Christians

With another installment of the Terminator movies about to be released, I am once again reminded of the harmful attitude of fatalism that permeates much of Evangelical thought about the future.  In the Terminator movies, both a hero and a villain are sent back from the future to try to change what is coming.  The villain wants to prevent the good guys from winning after a horrific holocaust, and the good guy is hoping to not only preserve that victory, but somehow make the entire dystopic future null and void.  Each of the Terminator movies ebbs and flows back and forth with the future fate of humanity hanging in the balance.  What has this to do with the attitude of Christians regarding the future?  Quite a lot actually.  Christians ought to know what the future holds, God has given us a broad outline of what will one day happen along with a variety of difficult to understand pieces of the puzzle.  What we do know, for certain, is how the story ends; it ends in the complete and total victory of Jesus Christ over all opposition: sin, death, and Satan.
So why are so many Christians walking around with an attitude that the future is doom and gloom?  The answer is simple enough, they believe in a Pre-Tribulation Rapture, and thus believe that the future of humanity is a downhill slope that cannot be altered.  Those who believe in a post-Tribulation Rapture, or a Post-Millennial Rapture are far less pessimistic because in the first case, Christians won't be taken away before the trouble starts, in other words, we're going to have to deal with it, and in the latter, the next thing to come on God's cosmic plan is the 1,000 year reign of Christ, a time of glory not tribulation.  Because many Evangelicals firmly believe in a Pre-Tribulation, Pre-Millennial Rapture, they almost welcome bad news in the world. looking at it as a sign that Christ's return is closer.  Why try to alter the world we're living in if it is inevitable that it will decline, and why try to slow the decline if it must reach its nadir before Christ can come back?
In the Terminator movies, when the heroes know that the future is bleak, they are willing to risk anything and everything to try to stop it.  For some Christians, they believe that they're interpretation of Biblical prophecy is the correct one, and therefore there is no point in trying to stop it.
I don't know which interpretation of the Scriptures is right, those willing to have a pinch of humility will agree, so why would I live like a pessimist?  It is our job to do what we can, with what we have, where we have been placed.  We do know how the story ends, but keep in mind, we have no idea how long it will be until the final chapter begins.  Christians need to ditch the pessimism, embrace the final victory of Christ, and roll up their sleeves and get to work trying to claim our world for the kingdom of God.