As I read it, he may be arguing against this sort of "tribal reflex", but he's certainly not arguing against it's existence. My point is that I am agreeing wit

As I read it, he may be arguing against this sort of "tribal reflex", but he's certainly not arguing against it's existence. My point is that I am agreeing with the parent of my original post, segregation can arise from phenomenon not necessarily codified into law or even recognized consciously by the participants. Whether this "tribal reflex" is "right or wrong" is irrelevant, the important and seemingly undisputed point is that it exists.