The aliens conclude that humanity's own fear, paranoia, and willingness to turn on each other are the true monsters. They see that it is human nature to destroy themselves when faced with the unknown and that they can easily manipulate humans by exploiting their fear and mistrust. Additionally, they realize that they can use humanity's weaknesses to take over the planet without ever having to reveal their true selves. Ultimately, the aliens see humanity as a weak and dangerous species that is easily controlled and destroyed.
