@fdr84,
I think that belief that a better world will come is not such a bad belief. It's the belief that they know it is coming right now or at a date that they can name that speaks to paranoia and human fear. The underlying message is that God has given people a deadline and they better meet it.
It is not surprising because human beings are conditioned to respond to deadlines from authority figures. Bosses, parents, even biology remind us that we have a limited time to get certain things done.
And death is really the ultimate deadline. But is it really?
Some beliefs say no.
If the soul is immortal and God understands the obstacles each soul faces, it seems really unfair to give someone raised in a really bad situation the kind of deadline that we are talking about. After all, people seem to have a limited understanding of life, God, and everything. I think God has to cut people more slack that what these deadline people are saying.