That's a sign of someone that has not absorbed any scientific education received.
Variation within groups is certainly interesting, but variation among groups is extremely significant, especially when the groups have widely different medians. Think of Pygmies and Watusi: this guy would have you believe that the individual variations among all Pygmies or all Watusi are more important than any group differences -- which is patently a crock.
If I didn't see people who sat through four years of college-as-indoctrination make such innumerate statements daily, I'd never believe anyone with a four year degree could make such a retarded comment. It's a complete straw man, and this guy i as much a scientist as Jeffrey Dahmer is a surgeon.
d.o.l.
Criminal Number 18F
You might find this article, written by a liberal, interesting.