I'm not exactly sure how the middle east plays our race wise...but aren't people from certain middle eastern countries considered caucasian? I know we were exploring the topic (on a different forum) before King Tut's haplogroup came out...and it became evident that in Egypt, certain regions were dominated by African lineages...whereas, other regions had European. I'd expect the middle east to have differing concentrations of Asian, Caucasian, and African lineages depending on region, location, history...Regardless, negative RH factor does occur in other groups, it appears, per this website, it's very low among Asians, about 25% for Africans, and highest in Europe, particularly the Basques:
http://anthro.palomar.edu/vary/vary_3.htm
Again at 23andme, the rate for negative RH Factor seemed high. Also, I've noticed how one particular person: an Irish person, from Ireland with only Irish ancestors, and who tracks in the middle of "Irish" in global similarity shares highly with so many people...even people who share poorly with each other. I always assumed the high sharing percentage among so many people was due to generations back Irish ancestry...and it may be the case...but I've started to wonder if that's Basque heritage that's getting picked up. I should note that at 23andme, it's very difficult to get "Irish" global similarity...so many people who self identify as Irish were coming up something else. At one point, this Irish person was the only one in there...even among other Irish, living in Ireland!
Here's a website making what I think are some pretty "far-out" claims, but I really am curious what the implications are for Rh negative blood types:
"There are other physical characteristics of humans which are typically associated with Rh-negative blood, but which in the present scenario would be regarded as belonging to the N-people. These include early maturity, large head and eyes, high IQ [6], or an extra vertebra (a 'tail bone' -- called a 'cauda'), lower than normal body temperature, lower than normal blood pressure, and higher mental analytical abilities [5]."
http://www.aoi.com.au/bcw/neanderbasque.htm