I think what we have here is a failure to communicate.

Because I post a thing doesn't necessarily imply that I believe the thing to be true. I post lots of things because I believe they are interesting and even provocative.

In the particular case of genetic differences among humans, I am by no means thoroughly informed. The last time I read a study was maybe in this century, I am not certain. However, I clearly remember a lecture I attended by Stephen Gould back in the '90's in which he cited a number of scientific studies of human populations in which the consistent finding was no difference between the variances among all racial groups. This means there is as much variation within a race as there is within the whole population. If all are equally variable, then there is no significant difference.