@Justin,
This reply is in direct response to the thread opener. My apologies if I say something that has already been stated. I fully intend to go back and read the other posts in this thread, but I wanted to reply to the opener while this is fresh in my head.
There is one simple reason why Christians look forward to a Revelations-like end of the world, and the reason isn't fear (fear is why they believe in the first place), it's doubt. Those Christians long for God (Jesus, w/e) to come down and say, "See, these Christians had it right all along, so Ha!" If Christians are afraid of anything, it's of being proven wrong, or, at least, not being proven right during their lifetimes.
They feel an all-encompassing need to have their faith validated. Because, quite frankly, most of them are tired of God, Christianity, Christ, church, the Bible and everything that is affiliated with such. So they have a dire craving to justify why they chose to adhere to this thing that they don't even like anymore. They stick with it out of fear for what will happen to them if they give up. Despite what they claim, they are not good people, nor do they want good things. They want to see hellfire and damnation descend upon those who don't agree with them, and it's quite clear by the thoughts stated in the thread opener (and in plenty of other Christian literature) that they have a divisive "us and them" mentality.
Doubt and fear walk hand in hand. And just about every Christian I talk to is obsessed with them. You cannot possibly hope to good while your head is full of worries about evil. And that is the Christian dillemma.