I wouldn't want a world without theists, who would we point and laugh at then? 
Seriously, like wwjs said, If people conclude they are atheists on their own volition, that's ok by me. But people have all kinds of unfounded beliefs and if religion were to disapear, something else would fill the void those with existential problems have.

Seriously, like wwjs said, If people conclude they are atheists on their own volition, that's ok by me. But people have all kinds of unfounded beliefs and if religion were to disapear, something else would fill the void those with existential problems have.