Another tactic often employed by race realists is the "evolution" argument, which seeks to suggest that blacks must have lower IQ do to evolutionary factors.
The basic premise of this argument is that blacks are the examples of humans that did not have the willpower or intuition to migrate out of Africa, and thus were selected for lower IQ
There are several key issues with this theory.
Firstly, it suggests that humans left Africa in one massive migration 100,000 years ago, which is not accurate. Humans left Africa over the course of tens of thousands of years in multiple migrations. The Sahara was also far greener during these migrations, and there were even migrations back through the green sahara during this time. The result is that humans are highly transient species, and differences in race can be generalized as simply differences in morphology do to superficial adaptation to varying enviornments rather than any evidence of evolutionary divergence. We know morphology is easily malleable, as if it weren't, we would not be able to observe it in real time through generational differences. It's also not entirely clear whether or not 50,000 to 100,000 years is long enough time for significant evolutionary divergence to happen.
Race realists will also often use differences in haplogroups to suggest a race-realist worldview, this is misapropriating data, and the genetic distances between given haplogroups is often exaggerated to promote this idea.