Well you know it takes all types for the world to function. Like on the one side you have maybe someone like Mother Teresa. On the other hand you have someone like Aleister Crowley. and everyone inbetween.
So yes of course there's these types. We think they're completely delusional. They think we are the ones who are delusional.
But even say we didn't have one shred of evidence to back up what we believe. There's still the age old saying that goes something like this....
"If I'm wrong when I die, and there is no heaven or hell, it won't matter because I'll cease to exisit. But if you die and you're wrong and there is a hell and heaven and your not ready then it will matter in a major way for eternity."
I think this is a sound argument. It's like at the lowest common denominator, why take the chance of finding out you're wrong.