Later on the Phoenicians, a semitic language speaking people, derived their alphabet from the Egyptian form of writing.
I suspect the writer of this article was trying to limit the term "Arab" to a handful of Bedouin tribes who became known to Roman tax collectors shortly after their conquest of Felix Arabia.
None of that matters. The original population in what is called Mesopotamia is pretty much the same today as it was when the Semites overran the Sumerians and adopted their written language. Persians (or Aryans) arrived much later than that. Their history includes the conquest of Babylon (more than once too).
No doubt the Aryans left behind a modicum of DNA.
The Mongols, who arrived much letter, left behind much more than a modicum of DNA ~ in fact, they caused such devastation in Mesopotamia they managed to change the ethnic background of every tribe in the region. The perception that Iraqis look different than Iranians is probably more a consequence of recent Mongol admixture and not of earlier Aryan admixture.
There is a Zen Buddhist document called "The Gateless Gate". It's supposed to have all the "basics" in it ~ and it's pretty basic. White folks get mentioned one time ~ reading The Fox I noticed "The Persian Had a Red Beard".
No doubt Mongol Buddhists deep into Zen roamed the streets of the burned out city of Baghdad searching for Red Bearded Persians ~ which would, of course, be a difference. Alas, unlike in the time of the Zen Masters (500 AD or there abouts) today's Persians no longer have red beards so the search would be unfruitful.
You wrote:
“No doubt Mongol Buddhists deep into Zen roamed the streets of the burned out city of Baghdad searching for Red Bearded Persians...”
Persians in Iraq rather than Iran being sought out by Zen Buddhist Mongols who were actually Mahayana Buddhists?
” today’s Persians no longer have red beards so the search would be unfruitful.”
Red hair is still seen in Iran even today: http://www.raceandhistory.com/cgi-bin/forum/webbbs_config.pl/noframes/read/1524