I would accept UFOs being all of the following before I accept the theory that UFOs come from another star system.
A) UFOs are military craft.
B) A trick of the mind.
C) Alternate Earth.
D) Future earth (time travelers).
E) Alternate non earth like Dimension (Origin of demons, and things that go bump in the night).
I would believe in UFOs being my selections of A through E before I accept UFOs from another planet.
My B is natural phenomena.
Wellll, the most likely answser is fallen angels from a spiritual dimension.
However, EVEN IF they are critters from distant planets, they are STILL in cahoots with satan toward setting up his evil END TIMES global government.
That’s all I need to know about who’s side they are on.
Where they are from is then immaterial.