Ashatav,
This is a frequent debate in ufology. My mother would agree with you. However, the crafts they fly in are technological and they have bodies.
With the large numbers of people experiencing this, to bring in the demon thing usually doesn't help them when they are seriously trying to 1) seek help and 2) get the bottom of the various agendas here. Thank you though for sending concern towards those dealing with this, however. It is appreciated.
