I have had a chance to listen to some of what you posted, if you listen to some of his last stuff there are various differing ideas that Keel promotes, maintains as many other greats did that there is no need for them to be extra terrestrial. Many differing and possible theories he puts forward. You would have to watch or read more of his work and look at the different theories he and many others have put forward. History record many many differing accounts of UFO's , men in black, hairy smelly monsters etc etc. He's actually very well read and interesting in his process. Man was a genius. Try and read" flying saucer to the center of your mind", pretty cryptic title but it's not suggesting what you think, there are many differing phenomenon.