There were redheads in ancient Israel. There have been redheads in the southern US for 400 years. I don’t think they’re going anywhere.
Ramses the Great was red-haired. It’s theorized that his ancestor Sethi, founder of the dynasty, took his name because of his resemblance to the red-haired, bad-boy god Seth.
Anyway, how do these people square their contention that genetics will just “switch” over night because of “climate change” with their “billions of years of random mutation” to get what we have now?