It means, I think he's incompetent and the stories he tells about our genetic makeup are, well, just stories, and not based in science. Considering the topic a

It means, I think he's incompetent and the stories he tells about our genetic makeup are, well, just stories, and not based in science. Considering the topic at hand, you should know who David Reich is. He (co-) wrote every single paper on Neanderthal and Denisovan genetics.