Demons as well as annunaki and other non 3d races are parasitic on the 3d beings. They harvest different layers of human psyche. Demons are people who died in trauma and became locked in anger, hate, etc. They were deemed not recyclable back into 3d life. The annunaki and associoate races takes on the role of light beings and draw the finer energies from man. The gods and goddesses live in bliss using the energy released from worship, love meditation etc. The light forces let the demons in their state so that humans will be afraid and swing to giving them the energy they enjoy.