See your problem is your failure to look at the issue objectively.
A rational and objective scale would look something more like this.
IQ 50-100 = Moronic Human who knows he is no genius
IQ 101-250 = Moronic Human with delusions of genius
What is more dangerous the moron who knows his limitations or the dilusional moron who thinks he is a genius?
Oh, you were so close, lol.
IQ 50-100 = smart ape who knows he/she is not a genius
IQ 101-129 = smart ape with delusions of being a genius
IQ 130-250 = smart ape that knows his/her limitations/strengths, he/she also knows that 95% of other HS apes are morons
Apes with 130+ IQ can create new knowledge.
Africans have education and poverty issues that translate to a lack of general knowledge.
IQ distribution among African apes is probably the same as that of European or Asian apes.