I'm sorry, I still don't see it. If the spirit is eternal, it doesn't need to be reincarnated again and again.
But I will bow out here. Thanks for trying to explain.
one reason that a demon/unclean spirit wants possession of a body
i can see where this is a personal threat to some who teach contrary. it's going to cost them their typical friends and flocks. they can't serve love, power, and capitalize on it.
so it does if it isn't spiritually maturing and trapped. when the spirit comes into the earth it is inprisoned in the earth, in the carnal. so then if the attraction to the fleshly, earthly isn't overcome then the spirit will choose that vs the higher state of spirit. it will war with the flesh. the person/form will continually die and have to make the journey over to keep up the facade. the identity is with a form.
but this is exactly what some teach as an illusion with the limited person. they either advance to heaven or get sent to hell. but what is hell/heaven but an inner struggle between service to self and service to all as self
if there is no escape from hell why does god exist in hell; if not to continually wait for the self-imposed suffering to stop and love to begin?
its the person free will, their spirit that separates/yokes themselves to love.
hell, or madness, is repeating the same behavior over and over and thinking it's going to get a different result.
also a reason that a demon/unclean spirit wants possession of a body