He cut to the chase. Which is what he said.

The logical implications of genetics determining IQ is obvious.

If genetics can determine physical appearance and genetics groups many certain physical aspects into a collection of common features for a race then if genetics determines intelligence, by what black magic does this grouping suddenly stop at intelligence?

Are we saying genetics can make Asians all have black hair, brown eyes, a tendency of a smaller size and suddenly zero effect on intelligence? Doesn't seem logical.

Thus when someone brings up intelligence and genetics it is by inescapable logic that they are also saying something about race.