It's an interesting thing "race" is. If, by and large, indians mate with indians, blacks mate with blacks, asians mate with asians, whites mate with whites etc, then will this not propagate different subspecified constituent groups within the "homo sapien" parent group?
As such, is it possible that each sub group has a natural tendency to certain innate behaviour patterns and physical attributes which differ from other groups? Thus there may well be differences to segregate within the species, in which case by the author of the linked documents there is a strong case that we have no choice but to be "racist" under the terms of his definition? In which case, "racism" should be accepted?
Like I said, it's an interesting this "race" is, since of you're not careful you can defend the indefensible