Whatever causes the UFO phenomena has been around for thousands of years. There is absolutely nothing we need do or should do or can do about it.
Perhaps avoidance is the best policy. Encounters with "them" (if there is a "them") do not seem to turn out very well for human beings. The folks who report "close encounters" seem to be often deranged in various ways after the experience.
Meanwhile, we have a globalist elite which appears to be caught up in psychotic delusions and wrecking Western civilization as fast as they can, with a plainly stated objective of reducing the human population by significant amounts. But don't look over there.
"Hey, mister spaceman."
"Won't you please take me along for a ride"
(The Byrds)
There is a school of thought that holds that the “aliens” are in fact demons and if you look at what happens to those who have encountered them, it is easy to see why some would think such.