If a person's political beliefs are biologically determined then very likely so are more basic social skills and interactions. Then it is reasonable for society to evolve into a "Minority Report" distopia. (https://en.wikipedia.org/wiki/Minority_Report_(film)).
That is the visceral reason I dislike these attempts to link political beliefs to biology. The science strikes me as a kind of modern day Phrenology (https://en.wikipedia.org/wiki/Phrenology). The unfortunate part is that the studies that "show" these relationships are picked up uncritically from the scientific literature by the general public.