Becuase they don't complain the same when people lie Asians or other whites do it, I have never seen a frenchman complaining about an English man or a Chinese man, or a German complaining about a Russian, but all of them complain whne a West African man goes there.
So in another words: Stupid people have to be slaves for intelligent people. Is that what you want to say or why did you mention this 'fact'. The mean and hateful intention behind your post is palpable. By the way: Social studys are always made by certain 'reseachers' who are following a certain agenda. Therefore IQ-Test are subjective and useless. Never trust any statistic you've not faked for yourself. And an IQ-Test collects data regarding 'intelligence' like one single breath of air absorbs oxygen in an oversized room full of oxygen. 'Intelligence' is incomprehensible, not ascertainable.