It's not the same case as North Macedonia, where it's recognized that the Slavic Macedonians are a separate group that replaced the Hellenic Macedonians (of which Alexander was a part).
Came there from where? Genetic tests show that modern day Egyptians (both Christians and Muslims) are still largely related to ancient Egyptians.
What with these kinds of claims popping up on HN all the time whenever an Ancient Egyptian related theme comes up.
Copts (Christian Egyptians who still use a form of Ancient Egyptian as their litigurical language) and Muslim Egyptians are genetically indistinguishable, and have been living side by side for generations.
Islam is a religion, and "Arab" is a linguistic identity that is still in the process of forming into a truly ethnic identity despite Khalil Gibran's (a Lebanese Christian American) efforts in the early 20th century.
This is how a Kurd can become the symbol of Arab nationalism (Saladin), a Central Asian Persian the symbol of Islamic science (Al-Khwazrimi), and a Iberian Jew one of the premier physicians and philosophers (Maimonides).
> I don't understand how people can confidently parrot this whole "modern day Egyptians are Arab colonizers" trope
At best ignorance. At worst Western ethnocentrism and racism.
Can you elaborate?
While the Revolutions of 1848 failed, it sparked the rise of the idea of "Popular Sovreignity" and "Nationalism", and played a direct role in sparking nationalist movements like in Germany (Bismarck), Italy (Garibaldi), etc.
It was in this milleu that Arab as an identity also started to arise, as opposition to the Ottoman Empire.
I recommend reading "Nationalism and the State" by John Breuilly [0] if you want to learn about the rise of nationalism as an ideology.
Also, Arab as a singular identity only started to arise when Khalil Gibran (a Lebanese Christian who immigrated to Boston as a child in the 1890s) began writing and developing contemporary Arab literature.
Like other early 20th century hyphenated American nationalists such as Valera (Ireland), Sun Yatsen (China), Syngman Rhee (Korea), etc he was influenced by the "great men" of the 19th century.
Wilson's 14 points also played a massive role.
[0] - https://press.uchicago.edu/ucp/books/book/chicago/N/bo361907...
Aren't the British mostly Saxons and Angles? Hence the name England, from 'Angelnen'.
Ultimately though, not sure it matters much now, a thousand years later.
The Britonnic Celts in the western highlands of the former Roman Britain were not easily or immediately conquered by the Anglo-Saxons. Hence, the Anglo-Saxon name for Britonnic Celts eventually became the modern English word “Welsh”. Though note that the Anglo-Saxon term “Wealh” would not have merely referred to the people of modern Wales in particular; any Britonnic Celt was a “Wealh”, hence the other Celtic homeland of Cornwall.