Yeah, it's tough to dissect that when everyone is categorized into one group, but as far as I know, faith is simply believing in that which you cannot prove. And if you go to the foundation of all theories and science today, that cannot be proven. So
I think being a believer has absolutely nothing to do with hell and the afterlife. It has everything to do with whether you want to have heaven or hell here on earth. When you live according to the teachings, you can create heaven here. Or if you don't, you can have pieces of hell. That's just my thought.
Hell does exist, but if it didn't, then all the good in the world would not make any sense. The good has to come with the bad. They're both coincide with each other. That has to happen in order for good to be understood.
If everything was good and everything was perfect, then life would be very meaningless. There would be no point to strive for better things. So the bad is what motivates us not to want to be good. It motivates us not to want to go to hell.