The dog-whistle being "in America".
I'm certain that blacks in other civilized countries around the world don't have this IQ problem.
Of course, the second a brilliant African doctor moves to the US, his IQ numbers are flushed down the dumper by the demographic "African-American" culture's average.
Actually, black Africans have similar average IQs to African/Americans. (Actually, slightly lower, as would be expected from a low-income country.) Those few who come here are fairly obviously the cream of the African crop.