There are four components to this. In no particular order: intelligence measurement, validity of racial division, genetic components of intelligence, genetic variation between groups. Your articles address the second point.

[2] above already shows there is no scientific basis to genetics explaining intelligence variations in human groups. Other studies [3] back this up, and there are studies clearly tying intelligence variations between human groups to environmental factors [4] [5].

Based on the easily googled wide availability of this information and given the environmental causes of IQ differences, I wonder if an easy scientific corollary is that racists must have environmental factors behind their inability to comprehend the established science in this matter. LoL

[3] https://doi.org/10.1073/pnas.2322874121

[4] https://doi.org/10.1037/a0026699

[5] https://doi.org/10.1037/a0029772