It appears to me that he's still in water over his head
The core of arguments such as this always depend upon cherry picking evidence, misapplying it to derive a conclusion, then ignoring all evidence to the contrary.
For the past 200 years, science has chipped away at the concept of race as a meaningful division of home sapiens. There was a time when Gauls and Teutons were considered separate races. Of course this was convenient for some people at the time, but today, the idea there is distinction between a Frenchman and German seems laughable. Today, modern genetics shows there are no fundamental differences between human being, regardless of superficial appearance.
There are some people who cling to the idea of race and desperately catalog the small differences, hoping to convince us, and maybe their selves that there is something to their claims.
It was not so long ago that scientific knowledge of atomic and molecular structure led thinking people to abandon attempts to transmute lead into gold. That is the nature of true science. When the truth is revealed, long held believes are challenged. Some people simply can't handle that.