Are there any behavioral differences known not to have a genetic basis? Yes. When in Southeast Asia, I don't show people the soles of my feet (it's not considered nice, at least in some places). In Europe I have no qualms about showing people the soles of my feet. Behavioral difference. Yet my genes don't change when traveling from A to B.
> Why would you assume human populations to follow a pattern distinctly different from all the rest of biology?
What exactly are you claiming about "the rest of biology"? Are you confusing human populations that look slightly different from each other but belong to the same species with different species of, say, felines?
"...evolved different inbred attitudes..."
This refers to evolved in the sense of genetics. Of course human populations have different patterns of behavior. But the question is whether these patterns are cultural versus being genetic. My response above has to do with the genetic basis of behavior differences.
EDIT: Thousands of years may not be enough time to cause a genetic basis for differences in human behavior. This was the original objection raised by interfixus. The objection does not seem reasonable given the lack of evidence given for said objection in the context of interfixus complaining about the sloppy thinking in the article.
Why would you assume human populations to follow a pattern distinctly different from all the rest of biology?