It depends on where you look. In my experience, only the fundamentalist denominations of the Church have, as a general rule, the doomsdayers. It's important to note what the essential elements of Christianity really are- they're the things common to all mainstream denominations, and that'd pretty much revolve around the nature of Christ, recognition of his dying on the cross and thus absolution for sins. What the problem is, is that most people don't seem to get the point that there is supposed to be a difference between what is considered essential (and common to the one holy, apostolic catholic Church) and the other 'peripheral' concerns.
I won't go into it any further than that, as I just wrote an article which basically covered my views regarding this matter, covered by:
http://dongstyle-ltd.livejournal.com/109621.html#cutid1 and
http://dongstyle-ltd.livejournal.com/109833.html#cutid1. It's big...but yeah.
My basic point is that I reckon those people who focus on the afterlife, hell, the rapture (there is no mention of this in the Bible at all, and usually the people who go on preaching about whatever that is take this as their authority) are actually missing the point of Christianity. Maybe to the extent that the integrity of their belief is compromised, and they cannot really be called "Christian" in the true sense of the word.
One reason I suppose they do this or feel they need to is because they want to feel righteous about this and that and will haggle with you over every little bit that you don't agree with them. I'd like to see what they think of Jesus and the Pharisees, personally, but since I'm not a Christian, I'd run the risk of being labelled a gnostic, blasphemer, or heretic simply because that's what would discredit me, and therefore my views.
