Debate and/or dispute are perfectly fine with me.....
How would I do demographics? By area, and the smaller being more granular so detail leaps out. And by behavior, such as sexual practices or buying patterns and the like. The root 'demos' means people, after all. How does a group of people behave? Some prosper with little. And some fail with a lot. Some get sicker than others.Asking why is a reasonable question. So a group will tell much of itself, unless too granular or too diffuse.
Watson's remark was about "testing," and that was enough to make liberals soil themselves. Ditto with Murray and others.
But attempting to use skin color is foolish, given a Clarence Thomas and a Ketanji Brown Jackson sit only chairs apart, but are worlds apart in terms of politics. And good sense.
Best wishes.
Just one other thought—almost all generalizations of science and politics for that matter start to fall apart when placed under the microscope.
Our language is imperfect—and much of what is taught in school is an oversimplification of a ridiculously complex real world.
That does not make generalizations useless—but they are most valuable when used with proper care and disclaimers as appropriate.