I am not a fan of eternal torment, for humans or demons; something about it bothers me; there is something there that is not right; and as usual, I think its man who has it wrong. I can't see God punishing humans alive for eternity, I KNOW that will not happen! That is an insanity that many believers are just flat out deceived with. I don't know what he will do with demons. I have a gut feeling that God will just " Will them out of existence." Because they were temporary existence and will be no longer needed. But I am not really sure.
Listen to what the demons said to Jesus in Matt. 8:29, "And behold, they cried out saying, What have we to do with you, Jesus, thou Son of God? Have you come to torment us " Before the time?" Listen to that! Isn't that interesting? They were obviously afraid of Jesus; but then they mention this " Time of future torment";
two things here then; one, the demons themselves are aware of their future, and they know they must face a time of torment. So they already know they are going to loose; they already know they themselves are doomed; they already know that they cannot beat God, so WHY are they doing this evil to humanity? Well I think its because its all they know to do. They are doing and being what they were created to be.
A Dog is going to be a dog, a cat will behave like a cat; they are only living how they were designed to live, they cannot do anythingelse. They are locked into instinctive existence! And I think so are demons. And so I question punishing them for all eternity, for doing what they were created to do. And they were created evil, this religious story about them once being good, then changing their nature to evil is hogwash! These spirit beings were created locked into their existence! They do as they are told by God and Christ to do; that's it! Period! There was no great angelic rebellion; nobody rebels against God in heaven; nobody!