Most white people aren't going to believe descendants of slaves are the 'real jews', because if they were the real jews, that would bring them under judgment for how they treated them and THEY would have to face severe judgment.
What Earthly power is that recognition going to bring anyone in the immediate future? The Bible promises that Jesus will come later and restore those Jews later, but most want to be elevated now.
There are numerous mentions of the Jews travelling south into Egypt during times of famine such as Joseph's family going to Egypt or Jesus and his family fleeing from Herod by going into Egypt. When the Roman invasion occurred, why wouldn't it be a possibility that they would flee south into a land that they've known, which is Egypt, and possibly deeper into Africa?
Tacitus on the Jews (110 ce)
Tacitus on the Jews - Livius
[2] The Jews are said to have been refugees from the island of
Crete who settled in the remotest corner of Libya in the days when, according to the story, Saturn was driven from his throne by the aggression of Jupiter.note This is a deduction from the name
Judaei by which they became known: the word is to be regarded as a
barbarous lengthening of
Idaei, the name of the people dwelling around the famous Mount Ida in Crete. A few authorities hold that in the reign of Isis the surplus population of Egypt was evacuated to neighboring lands under the leadership of Hierosolymus and Judas.note
Many assure us that the Jews are descended from those Ethiopians who were driven by fear and hatred to emigrate from their home country when Cepheus was king.note There are some who say that a motley collection of landless
Assyriansnote occupied a part of Egypt, and then built cities of their own, inhabiting the lands of the Hebrews and the nearer parts of Syria.
The Project Gutenberg eBook of Timbuctoo, by James Grey Jackson
Written in the 1800s
An Account of Timbucktoo.
"Yahoodie, a place of great trade."
This place is reported to be inhabited by one of the lost tribes of Israel, possibly an emigration from the tribe of Judah. Yahooda, in African Arabic, signifies Judah. Yahoodee signifies Jew. It is not impossible, that many of the lost tribes of Israel may be found dispersed in the interior regions of Africa, when we shall become better acquainted with that Continent; it is certain, that some of the nations that possessed the country eastward of Palestine when the Israelites were a favoured nation, have emigrated to Africa.
) in those areas, but not the whole area themselves. And I feel the same with Nigeria/Gad but was just showing breh that there are connections to be made between Igbos/black Americans/Israel....