And these are not Bible-thumbing military men. These generals are saying that what we are dealing with conforms in general terms to what "might" have historically been thought of as Biblical demons. In other words, they appear to be interdimensional beings and somehow seem to have a paranormal element to them.
Many people who have been abducted by so-called aliens describe their abductions as a physical and spiritual "rape." Meaning their experience suggests that some of the beings are evil.
Imagine you get up in the morning and, even though all the doors in your house are locked, the floor is covered by large muddy bootprints.The police are called and they tell you that this is impossible because all the doors are locked and there are no muddy boot prints on the front or back porches and all windows are free from muddy handprints or smudges.
That's the situation we are in.
Some people cry about how vast space is and how little humans are capable of re: space travel and our understanding of physics.
All that aside...there are muddy bootprints all over our planet.