Well in order for our non belief in heaven and hell to be the work of "the deceiver", one has to first believe in him, which I'm afraid I don't.
Can you explain to me please why you would worship a creature (God) who creates other beings, all of whom are subservient to him, and the one, the most beautiful of all, questions him, and then gets cast down into a fiery chasm? Now please tell me how that thing that started it all off can possibly be good, when it treats it's erring children thus?
I'm sorry but I find belief in heaven and hell to be utterly morally reprehensible. We should be good people because that's the RIGHT thing to do, not because we're sh1tting ourselves in case we go to hell... it just dumbs people down and makes them less than their full potential.