Ok, I Love this subject.
First let me respond to some of the stuff that's been said:
FIRST CONTESTANT!!
Carlitos Whey (great movie).
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Well, since Jesus was a real guy, who came back from the dead once before, I'd say that the 25% are just optimistic, not crazy.
Betting on a Barack Obama presidency circa 2008 is optimistic. Now I'm not trying to say belief in the second coming is crazy, just that it usually is. Jesus died somewhere in the 0030's. (AD). Now there have been just thirty years short of ------TWO THOUSAND YEARS--- in which Jesus did NOT return!!! SO WHY IS THINKING THAT NEXT YEAR, OF ALL YEARS, is the one that Jesus is going to return in, Not Crazy!
I'm not trying to say that the idea that Jesus will come again is insane. I think a belief in the seemingly improbable is a very important part of all religions. A crucial part. Christianity has value, the second coming has value. For example I love the song "People Get Ready" by Curtis Mayfeild, or the Bob Marley cover of it, "One Love." So the second coming is crucial and Christians need to contemplate its meaning. But this idea that we are going to willfully dillude ourselves into believing that Jesus is going to return this year is, I think, a misreading of the second coming. And it hints that maybe, something is wrong with us as a population and a culture. maybe we WANT this world around us to be destroyed, judged, and reborn.
As a resident of Atlanta, may I say we call that William Tecumseh Sherman, not Jesus.
SECOND CONTESTANT:
BaphometsAdvocate.
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I think the massive mistake the Left will continue to make is that there are no God fearing Americans who vote Democratically/Liberally and so it's OK for the Left to mock them. There's a lot of Left skewed demographics that go to church on Sunday, and Saturday too.
Yes lots of God Fearing Americans vote Dem. But Christianity is far from monolithic and many Christians within Christianity mock this apparantly huge minority of christians who adamantly believe in this kind of revelations gospel. So, by mocking this 25%, the Left might actually be entering into the religious debate and attracting a large population of more moderate christians . In other words, they may not be just going for the Jews and Atheists. They might actually appeal to Christians who identify as similarly religious to these more secular, less apocalyptic Dems.
Now Answers:
1. What are the social and personal forces that give rise to this kind of thinking?I believe that perhaps the United States is becoming something of a neocolonial society in which the residents increasngly feel that they are oppressed by invisble forces they cannot pinpoint to decry. We were raised on dreams of opportunity, and maybe that dream is not there for a lot of people. If I sound too much like John Edwards, then let me make a graph:
Divide these traits into two types of societies:
First World:
(Europe, for example, or South Africa)
Low Birthrate, older parents, shrinking population
Rampant Immigration
Secular or Moderate Religions prevail
Homosexuality, at least in ideology, accepted
High Rate of Education, high rate of carreer change, 'opportunity'
Third, or Neocolonial World:
(Africa, Latin America, Carribean)
Skyrocketing Birthrate, younger parents
Homogenous population
Prosperity Gospel, Homophobia, Revelations Preaching prevail
Low Rate of Education, early entry into the work place
In someways, I can see how different communities in the United States are divided between those two catagories.
The fact that the right-wing sect of the divided Episcopal church is considering aligning itself with the Anglican church of Nigeria says something about that. Cosmopolitan South Africa has legalized Gay Marriage-- it will be a very long epoch before the same happens in, say, Jamaica or Catholic-dominated Latin America. You can see how were the world divided up into states, with two parties to choose from, Jamaica and Alabama might be caucusing together, Sweeden, New York and South Africa might be as well.
I think the United States is in the curious position of being the most powerful cultural force in the world-- but a place where many Americans feel disconnected with the very culture they export. The heap of blame slapped onto the Mainstream Media

(they deserve it), the outrage the followed Janet Jackson's Nipple

, the kind of ongoing anti-Hollywood culture wars all suggest that the Church has become a kind of lifeboat from the onslaught of what is identified as 'American culture' from, into, of all places, 'American homes.
2. Do you think these kind of beliefs have political implications and if so how do they play out?
Absolutely I think that the growing rift in churches like the Episcopal church is going to play out in the religious rhetoric of our politicians. In the end, I think its going to actually help the Democratic party.
Waves of dread come and go in and out of a society, and should this War on Terror ever fizzle out to being little more than a silly monicker for wars past, then I think the Dems will be left clutching the sensible cards. I'm not crediting the entire rise of the religious right to the War on Terror, that would be ghastly eronious. But I do think the Religious Right feeds off dread, and its not hard to miss the connection between Hawkish conservatives, quick to identify a foriegn threat, and the pastors who rally behind them.
For example, remember when Pat Robertson prayed for God to assassinate Hugo Chavez? It came after a diatribe of his on Chavez's militarization. (Which, in terms of real threat posed to us, is a joke).
So I say there is absolutely a connection between the Religious Right and America's addiction to Foriegn Militant Threats, and in that sense, the end of the Cold War helped Clinton, I think, in a very similar way to how the end of the War on Terror will help the lucky Democratic Presidential Candidate who coincides with it.
3. To what degree do you think either party is propped up by people who think this way?
Maybe I just answered that. HAVE A WONDERFUL 2007!!!