That 19th century definition of Mongoloid is nonsensically arbitrary, so instead I was interpreting it in as generous a way as possible: residents of Mongolia or Haplogroup C3
The closest relatives of Genghis Khan, whom he claims is the source of superior intelligence, live overwhelmingly in modern day Mongolia and Kazakhstan. They are more related to Navajos than to modern Chinese, Japanese, Koreans or whoever else fits in that 19th century definition of "Mongoloid".