The lily-white Swedes and Finns have ‘pure genes’, but we marry ‘ethnics’ and different ‘species’. White folks are not ‘ethnics’ in America, so the ‘other species’ are exactly the peoples you’d expect Fox would assume to be as much.
Since I’m a genetics guy, I can speak with a little authority on this: If you can interbreed with a group of individuals and produce viable offspring, they’re not a ‘different species.’