Brain damage would explain how a man who was once respectable and intelligent could end up spouting insane gibberish the way he does. Because he's using pseudoscientific terminology, the public with their government-school educations think he's saying something profound. Deep down, the public is becoming increasingly aware that we have been lied to, so everyone is hungry to try a sample of the novel thing called truth. Anybody with a claim that they have this suppressed truth is likely to find at least some who are ready to believe in it...to believe in anything different.