Please, get familiar with the writings of antiquity about the Jesus story.
These are the fundamental facts.
1. In writings attributed to Josephus, Tacitus and Suetonius up to c 115 CE it is admitted that the Jews BELIEVED their Prophesied Jewish Messiah was ALIVE c 66-70 CE and was fighting AGAINST the Romans and would become RULER of the habitable earth.
2. From the 2nd century or later in writings attributed to Aristides, Justin Martyr, Irenaeus, Tertullian, Hippolytus, Origen, Clement of Alexandria, Lactantius, Eusebius, the author of Acts, Pauline writers, Chrysostom and others it is claimed that the JEWS KILLED the Son of their OWN God and that was the reason for the destruction of the Temple and Jerusalem.
3. The claim that the JEWS KILLED the Son of God MUST be a known LIE to the inventor. Humans beings cannot kill Gods--they never existed.
4. Apologetic writers like Justin Martyr, Hippolytus, Tertullian and Irenaeus mentioned by NAME Egyptian CULTS with stories of Jesus like the Basilidians, Cerinthians and Valentinians.
5. The authors of the Canonised Gospels are all Fakes.
6. The Pauline Corpus is a compilation of up to seven FAKE authors.
7. No recovered manuscripts of the story of Jesus of Nazareth and Paul of Tarsus have been found and dated to the 1st century.
8. No recovered manuscripts of the Jesus story of Nazareth and Paul of Tarsus have been found in the Hebrew language.
9. Multiple 2nd century or later Apologetic authors do not show any influence by the Pauline Corpus, and the Pauline Revealed Gospel [Salvation by the Resurrection].
10. It is from the 2nd century or later that non-Apologetic mentioned Christians who worshiped a crucified man as a God.
11. Non-Apologetics in the 2nd century do NOT mention Paul but know stories of Jesus.
12. Non-Apologetics mention Jesus and Paul starting around the 4th century.
13. Virtually all Apologetics mention Jesus and Paul starting around the 4th century.
The Jesus story, the Gospel, was developed BEFORE the Pauline Corpus and the Pauline Revealed Gospel.
The Jesus story was NOT written by Jews--they are all Fake.
It was the Egyptians WHO TAUGHT the early stories of Jesus.
Hippolytus "Refutation of All Heresies"
Hippolytus Refutation of All Heresies
I don't understand what Paul had to do with the question; it's as if you were answering some question about Pauline origin - which I have no concern over.
We have already donned the axiom of the texts being created in Egypt in a likely place such as Alexandria, so the question of where is not so much a problem.
But the above still does not indicate how you are determining that out of all of the cultures that wrote in Alexandria, that the Egyptian citizens themselves were the ones who wrote these texts.
You seem to be, unless I am mistaken, suggesting that because the Egyptians were teaching people that they therefore created the content.
That is a possibility, but I don't know how we rush to that conclusion so quickly when we know the Egyptians of Alexandria taught on a very wide range of subjects which they themselves did not write, and that Egyptians were seen as the go-to trusted source for anything to do with Middle Eastern history, since they were closer to the regions around them (Middle East) than anyone else was in the Mediterranean (and also had an established culture of academics; other cultures were closer perhaps, but lacked established cultures of academia and cataloging).
Your citations of early groups is interesting.
You stated:
"Egyptian CULTS with stories of Jesus like the Basilidians, Cerinthians and Valentinians"
Basiliadians can be granted as an Egyptian cult (meaning; beginning in Egypt), but the latter two are an interesting count.
Carinthus' following starts in Anatolia, and Valentinus' following starts in Rome.
Also, and this I have been letting go, but being educated by the Egyptians does not mean "taught the Jesus story by Egyptians".
It means he was educated by the Egyptian academia; a scholar.
Several, several individuals were "educated by the Egyptians" during the tenure of Alexandria and yet they were not receiving instructions on religion.
Notice the following line about being taught of the Egyptians: "Cerinthus, again, a man who was educated in the wisdom of the Egyptians, taught that the world was not made by the primary God, but by a certain Power far separated from him..."
The blame in this is stating that since he was taught by Egyptian academic ways, that he had an heretical standing regarding the origin of the universe, as opposed to the indoctrinated origin of a God-creator.
Regardless, however, I still have not at hand a reason to assign the creation of the texts to Egyptians, nor do I yet have a reason to assign the story as Egyptian mythology, nor that it was an Egyptian mythological hoax (a hoax is a very specific type of deceit), nor that all of this was done by Egyptians for the purpose of rationalizing the destruction of Jerusalem.