Well
@Saif al-Arab has a proclivity or fondness for bringing in Sri Lankans, Banglas and India when talking about Pakistan. He of course overlooks that the Arabian peninsula actually is splintered from Africa by the Red Sea. Many Arabs are indifferant from Eritreans, Sudanese, Somalis etc. These places are in some instances less than 100 miles distant and have a profound impact on Arabian peninsular populations.
And I despise his oil fuelled arrogance. Yesterdays half naked camel riders making cheap of our poor people. Here have a look at a intro on KSA. And his on PDF and has the galls to call me "obsessed" with Arabs ... tsk tsk !
https://defence.pk/pdf/threads/saudia-arabia-before-the-oil.470471/
Not a bigger fondness than you bringing up Afro-Arabs who make up 1-2% of the 500 million big Arab population, which you did just again.
Yes, the Arabian Peninsula is close to/bordering Asia, Europe (Eurasian continent which it itself is a part of) and indeed Africa.
As is all of Southern Europe, you know. Some places even
much closer. However there is an entire sea that divides the Arabian Peninsula from Africa (North Africa and Horn of Africa - which ironically is inhabited by Caucasian people as categorized by racialists and people who have genetic ties to the Middle East/Near East and who speak Afro-Asiatic languages). You might google how an average Habesha women looks like from Ethiopia/Eritrea and how an Nigerian woman looks like and tell me if they are similarly looking. In fact people living there have a bigger facial resemblance to Caucasians than many people in your immediate proximity as per what I have seen. Not that there is anything wrong with that. For instance I have a weakness for Habesha women so I am a happy man.
However I have to disappoint you by stating a fact which is that there was never or is not a profound genetic impact.
Results
The Saudi Arabian group showed greatest similarity to other Arabian Peninsula populations (Bedouin from the Negev desert and Yemeni) and to Levantine populations. Nearly all the main western Asia haplogroups were detected in the Saudi sample, including the rare U9 clade. Saudi Arabs had only a minority sub-Saharan Africa component (7%), similar to the specific North-African contribution (5%). In addition, a small Indian influence (3%) was also detected.
Conclusion
The majority of the Saudi-Arab mitochondrial DNA lineages (85%) have a western Asia provenance. Although the still large confidence intervals, the coalescence and phylogeography of (preHV)1 haplogroup (accounting for 18 % of Saudi Arabian lineages) matches a Neolithic expansion in Saudi Arabia.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1810519/
Those 7% Sub-Saharan matches (perfectly) the Afro-Arab community (5-10%). The 3% South Asia perfectly matches settlements from South Asia (mainly due to Hajj and Umrah for the past 1400 years) and pre-Islamic contacts that predate the IVC.
As for your thread which was dismissed (and most of those photos being black and white and not even from KSA), those are isolated Afro-Arab communities in the Rub' al Khali.
In fact Saudi Arabians and Arabians as a whole score one of the highest West Asian admixtures (basically Middle Eastern and Near Eastern) in the world.
Here is something else for you (DNA - the real deal):
Some results from your average Arabs (much larger samples too)
https://www.familytreedna.com/public/arabworlddnaproject/default.aspx?section=yresults
https://www.familytreedna.com/public/arabworlddnaproject/default.aspx?section=yresults
https://www.familytreedna.com/groups/arab-tribes/about/background
Saudi Arabians:
Paleoafrican: 0% South Asian: 0%
West Asian: 27,9% Southeast Asian: 0%
Sub-Saharan: 0% Atlantic-Baltic: 0%
Red Sea: 34,6% (itself West Asian) East Asian: 0%
Mediterranean: 37.5% Siberian: 0%
Egyptians:
Paleoafrican: 0,6% South Asian: 0% West Asian: 24,4% Southeast Asian: 0,2% Sub-Saharan: 12,2% Atlantic-Baltic: 1% Red Sea: 24% East Asian: 0%
Mediterranean: 37.5% Siberian: 0%
Source:
Write https:// and afterwards docs.google.com/spreadsheets/d/1q1LKZqeQRS28WjwyAQPs5I7QBUWv3Q3mF9bVpJp6eX0/edit#gid=0 (DNA results from 100 + populations across the world, including Pakistan)
Let's see what racist Europeans wrote at the height of Nazis and before and even after:
The
Arabid race[1] (also
Oriental race[2] or
Syrid race) is a historical term for a morphological subtype of the
Caucasoid race, as used in
physical anthropology.
The Arabid race was thought to have originated in the
Arabian Peninsula, and it is currently predominant there as well. It is a major element in the
Levant region of the
Middle East, and a minor element in other parts of
Western Asia.
[3]
Physical appearance
The Arabid race was distinguished from the West-Mediterranean race by
some minor characteristic facial traits. These include almond-shaped eyes, very dark hair color, the Semitic smile (conditioned by unusually deep
Fossa canina), untanned skin color tending to a pale olive, and often but not always a narrow or a broad
aquiline nose.
This physical type had in earlier times a broader-formed Syrid subtype, which was found among the farmers of the
Fertile Crescent.
https://en.wikipedia.org/wiki/Arabid_race
I am truly shocked by all this, DNA included, knowing the history, ancient population movements since the Neolithic era (that originated in our lands) and before, geography etc. I honestly thought that we would cluster with Zimbabwe, Mongolia and Sri Lanka. 
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