Race has something to do with it. A lifetime of mixing with East Asians has left me with the impression that the level of nuttiness there is somewhat higher than it is among Europeans.
I don’t have much direct experience with blacks, but people who do tell me that high proportions of them believe in something crazy: AIDS is a CIA plot, a mad scientist named Yakub created the white race, O. J. Simpson didn’t kill his wife, etc.
