Race-realists simply point out the fact that the well established and powerful scientific construct of IQ differs between races, and this looks genetic. They go into some rather complex behavior genetic arguments I doubt you'd understand to underline this, but it's pretty standard genetics.
This information is very useful for explaining national differences, and informing aid and immigration policies.
Unfortunately a bunch of filthy SPLC type kikes bought science (Boas, Lewontin) and want mass immigration to White nations (but not Israel) so attack this science with lame ad hominems and fake science.
http://www.angelfire.com/rebellion2/goyim/je1.pdf
"Father of American Anthropology" and Father of American Fake Science Franz Boas.
A further publication by Jantz based on Gravlee et al. claims that Boas had cherry picked two groups of immigrants (Sicilians and Hebrews) which had varied most towards the same mean, and discarded other groups which had varied in the opposite direction. He commented, "Using the recent reanalysis by Gravlee et al. (2003), we can observe in Figure 2 that the maximum difference in cranial index due to immigration (in Hebrews) is much smaller than the maximum ethnic difference, between Sicilians and Bohemians. It shows that long headed parents produce long headed offspring and vice versa. To make the argument that children of immigrants converge onto an "American type" required Boas to use the two groups that changed the most."
By 1915 the Boasians controlled the American Anthropological Association and held a two-thirds majority on its Executive Board (Stocking 1968, 285). In 1919 Boas could state that “most of the anthropological work done at the present time in the United States” was done by his students at Columbia (in Stocking 1968, 296). By 1926 every major department of anthropology was headed by Boas’s students, the majority of whom were Jewish...
Boas rarely cited works of people outside his group except to disparage them, whereas, as with Mead’s and Benedict’s work, he strenuously promoted and cited the work of people within the ingroup. The Boasian school of anthropology thus came to resemble in a microcosm key features of Judaism as a highly collectivist group evolutionary strategy: a high level of ingroup identification, exclusionary policies, and cohesiveness in pursuit of common interests.
http://en.rightpedia.info/w/Franz_Boas
http://en.rightpedia.info/w/Boasian_pseudo-anthropology