If the quote is correct, and not selective, it is a step too far. I have a suspicion, however, that the statement has been edited for punch; edited quotes are a frequent occurrence in the press.   

Lumping all Africans (I presume meant were a group of people with dark-skin and perhaps a selection of some other physical characteristics) is as bad as lumping all Europeans or all Asians; quite a jumble of physically variant creatures. Whether they have mental abilities that are the same in all aspects is a matter of speculation only at present. In fact, however, there does not seem to be any difference that would prevent any group from integrating into and functioning in society.

I remember some years back when a prominent sports commentator was fired by his broadcasting company for mentioning the muscle structure of certain Black athletes, which gave them an advantage in certain aspects of American football. Other groups had advantages in other ways. These variances are evident to anyone utilizing detailed physiological and forensic studies, but they still cause much tearing out of hair when they are mentioned.