I agree with you that there is no negriod blood in central asia or iran,except for maybe some slaves that came there and some swahili traders that settled around the persian gulf. I think using the term negroe is a little out dated and racist.
You are quite wrong about egypt,and upper egypt has always had negriod blood and still does to this day. The people you are talking about in northern africa are of costal berber ancestry,and not egyptains which many white people try to use the berber population to claim egypt not realizing that upper egypt is exactly where the civlization came from which was since pre dynastic naquada era negriod.
You sdon't need to jump people and call names is not necessary to do this when debating subjects.
I think many people are just as ignorant to the population of maghreb to think all people in the maghreb look like arabs,or light skinned berbers or amazingh is not the case.
i myself am of both egyptain and maghreb ancestry.
The black groups in the maghreb are the tibbu,tuarege,haratin,and others

in antiquity there was a people caleld the maure which was described by propocius a byzhantine writter as darker than the other populations of the magreb.
also a people caleld the afer were called dark skinned and thick lipped by virgil a roman writter.
as far as egypt I will give you some references that present your statments to be incorrect,and believe me i am not a black american.
The mid-twentieth Egyptologist Alan Gardiner, who was considered an
authority on the ancient civilization of Kemet, gave the following
report on the human remains of the pre-dynastic Badarians, Amratians,
and Gerzeans:

"These... were long-headed-dolicocephalic is the learned term-and
below even medium stature, but Negroid features are often to be
observed. Whatever may be said of the northerners, it is safe to
describe the dwellers in Upper Egypt as of essentially African stock,
a character always retained despite alien influences brought to bear
on them from time to time." (pg. 392; Egypt of the Pharaohs 1966)

The early nineteenth century scientist J. C. Pritchard, who is
considered as one of the founders of the field of ethnology, reported
the results of a contemporary anthropologist Dr. Baron Larrey, who
conducted a comparative analysis between some ancient Kemetic skulls
and those of the so-called Negro, which is a figment of Eurocentrists
imagination:

"He says that the mummy heads found at Saqqarah displayed precisely
the same character, namely, the prominence of the cheek-bones and of
the zygomatic arches, the peculiar shape of the nasal fossae, and the
relative slight projection in the alveolar edges, when compared with
the corresponding structure in the Negro skull." (pg. 286; The
Natural History of Man 1848)

Specifying on the human remains of the pre-dynastic Badarians,
anthropologist Brenda Stoesigger, who was contemporary of Gardiner,
wrote:

"A Negro admixture in Egyptian races has often been discussed. The
Badarian skulls appeared to be slightly prognathous... in general to
be somewhat nearer to a Negroid type. Since cephalic index and other
calvarial characters vary over a wide range for Negro races,
therefore the Egyptian series may easily fall within their limits...
The Gaboon and northern Negro races wre selected because they are the
races represented by an adequate number of skulls which are nearest
in type to the Badarian." (pg. 124; A Study of the Badarian Crania
Recently Excavated by the British School of Archaeology in Egypt;
Chapter 7; 1927; Biometrika Volume 19; 1954

there is also evidence that the concepts of a pharoah might have come from nubia