I've decided that there are two types of theists. The ones who use the instructions in the bible to help guide them as they try to lead useful, productive and saintly sorts of lives. And as long as they aren't trying to use the bible to make public policy and such, I'm fine with that type.
The other ones are the folks who have their whole future planned out, as inhabitants of heaven, and the present isn't really all that important, except for the part where they have to make today miserable for everyone because the righteous like to do things that. They know where they're going, and their superiority complex, combined with their general obnoxiousness and their propensity for deciding that I'm going to hell sort of ruins everything.
Though logic isn't involved, a messed up type of logical thinking is. Obviously if they are going to tout heaven as a place you can go only if you are saved, there has to be an alternative destination for those who don't make the grade. And Detroit wasn't foreseen in the bible. So they came up with hell.
In their black and white world, the two destinations just had to be polar opposites.
I have been told by a few theists there there isn't a hell, that if you don't go to heaven then you are just separate from god for all of eternity (apparently thats a bad thing) and stuff like that. But those folks are no fun. It is hard to poke fun at the blasé.