Horrors beyond imagining, and it's not aliens eating our heads! It is us ourselves.
Columbus accomplished this bringing slavery to the western hemisphere according to James W. Loewen in Lies My Teacher Told Me. A very dirty-dealing Christopher —a lying, cheating, thieving, and serial-murdering-for-profit brand of "Chris"— initially found his "Indians" delightfully spiritual beings as "uncomplicated and intelligently innocent as gifted children" — to paraphrase from his own hand. Only later would he classify them as "guileful vermin" when he realized —with his second thought— that they could be terrorized into collecting gold for him in a color coded system that, oh by the way, lost the reluctant collector a nose or an ear ...or a child... if he didn't cough up the dictated tithe, on time...
Cognitive Dissonance, in so many ways . . . the above I know well, working in schools. Alfred's been there himself as well, read this.
Bringing us up to the UFO issue:
This begs the emblematic question. Who profits in this legislated, continuing and traditional ignorance regarding UFOs?
There's no interest, disinterest, and trivialization within ignorance of the subject; anyone who "believes in" UFOs gets the glassy eyed look from others. You know they can handle you blabbing on about the Rapture far better than the sujbect of UFOs, let alone aliens.
So why is the truth kept from us, about UFOs? As Lehmberg writes, it is, and anyone who thinks otherwise just isn't paying attention. So, why is it so? Read his article Cognitive Dissonance on his blog an alien viewand find out.