Is it wrong to believe eternal life is for everyone?
Maybe the better question is whether it is right to believe the creator would banish some of the creations to an eternity of torment?
Or maybe it is why do we even bother with such questions at all? If we didn't treat each other in particular ways because of such beliefs, these questions would be irrelevant, better left to the philosophers and theologians. But that's not the world in which we live.