Demon Talking out Of Teenage Girl Describe The Devil Hell - Heaven

Ok, first off i want to say that yes demonic possesion is real but here is the problem i have with this and the fact that this guy talking to the girl. He said you where in Heaven at one time and the demon acknowledged this. Is this a demon because demons have never at any point resided in Heaven. The fallen angels did but far too many including believers think demons and fallen angels are one and the same but they are not. Demons also know that they will never be forgiven because it cant happen. God did not create the beings that became demons. Demons where once living in the flesh. They where born in flesh but they where the offspring between woman and fallen angels. Women where able to be impregnated by an angel and the offspring are what is called nephilim or the giants. Golliath had an angelic father and human mother and when he and those like him died…their spirits became demons. They are an abomination and thus cant be allowed into Heaven God created man, God created angels but He didnt intend for them to mate an have offspring. The reason the fallen angels wanted to do this was an attempt to corrupt the would be future savior. They knew in order for there to be a savior he would have to not inherit sin and we inherit through the seed of our fathers. Them mating and having offspring was an attempt to alter dna the person who would be His mother. If you alter a persons dna you will no longer be made in the image of God. Ever heard that when a person takes the 666 mark of the beast that you can condemn yourself to hell before you even die? Ever wonder how that will be? Well the mark will do this to those who take it. And like the nephilim wasnt allowed into Heaven upon death, neither will those that take the mark. Another thing that was said was that satan is in Hell. Fallen angels unlike demons can go between spirit and flesh at will, at least for now. Angels do not need to posses. Another thing said was that demons are forced to posses. Well they are forced to serve satan but they gladly posses people because when they arent attatched then they are in more torment. They cant posses without permission and giving it is easier than many think. Many are possesed and dont know it and they dont because the demon lays low because if anyone finds out then that person may do something about it and therefore risk being cast back into that place of torment. Like i said, demonic possesion is very real but in this case…..this girl may have become confussed and for some reason self manifesting this behavior. At one point the way she said things was more like a kid than an ancient deity spirit. “Because you guys yada yada” doesnt sound right to me. They surely wont say they should have stayed with Jesus because they never have to begin with.