If you are placing the ethnic ties of Jews today as Khazarian then you truly do not know history well and are plugging in gaps that have already been filled.
This Khazarian hypothesis is only relevant to Ashkenazi Jews and their migration. You would still have to plug int he concept of Jews being black in origin when there is no archaeological evidence to support this coupled by the fact there has been no written historical record of them being black for millennia.
The archeological evidence was literally in the OP. The excavation of Lachish revealed that the cities inhabitants at the time of Assyria's pillaging and destroying of it closely resembled the inhabitants of Egypt at that time. Who was in power in Egypt 700B.C.? The Nubian Dynasty. That's why David the excavator and researcher said that finding could have far reaching implications. The people who lived in Israel were Black people. The Assyrians created murals called the Lachish Reliefs that commemorate their victory over Judah during that siege. The reliefs depict Black people with nappy, beady, curly hair being murdered in all sorts of ways.
Furthermore, studies have shown that practically every region of Europe or the Middle East where people claim to be Jews, Spain, Portugal, Sardinia, Italy, Greece, Turkey, Ashkenazi, Palestine, Lebanon, Saudi Arabia, Iraq, Iran, they all have trace amounts of OUR DNA in their populations and we can quantify the generations that our blood has been admixed into their population. If we have the generations, multiplying that by the average amount of years per generation reveals the time frame at which our "Sub Saharan African" DNA was introduced to all these people at different times and places. They all coincide with the historical movements and documented presence of Jews hundreds if not thousands of years ago. Take the Ashkenazi for example; they will tell us, "Okay, E1B1a DNA was present at the foundation of the Jewish people, but it wasn't a founding stock for the Jewish people." When were their "Jewish" people founded? The studies reveal 91 generations ago, plus or minus 11 years as a margin of error, our blood was introduced to the Ashkenazi. The average amount of years between generations is 29 years. Let's do the math together. 91 x 29 = 2639. It's 2018 today. 2018 - 2639 = -621. That's 621B.C. 11 x 29 = 319. So the time frame where our blood fell into their hands was around 621B.C. give or take 319 years. The conquest of Babylon by the Medes and the Persians took place around 539B.C. Ashkanaz was one of the Turkic nations listed as invaders of Babylon along with Ararat and Minnie. Many of the Jews are recorded as staying behind in Babylon during that time and that provides a window for admixture, both with the Ashkenazi and the Iranian Persians. Many Jews moved to Iran. The Iranian Jewish people today claim to be the descendants of those Jews, but that blood has all but been bred out. Either way, claiming that our blood was present at the foundation of their Jewish lineage makes them about 1,000 to 500 years short of being formed by Abraham or Jacob, because they lived close to 2,000B.C. not 500-600B.C. This isn't even considering the Jews wrote about Ashkenaz as a foreign body.
Then we have the Southern Italians. 62 generations plus or minus 6 generations our blood has been mixed with their population. 62 x 29 = 1798. 6 x 29 = 174. 2018 - 1798 = 220C.E. Plus or minus 174 years. The Israelite historian Flavius Josephus recorded that tens of thousands of Jews were taken into slavery into the Roman Empire after the destruction of Jerusalem in 70A.D. Southern Italy was one of those locations. I know this because in the catacombs of St. Domitilia, there are paintings of Black Israelites dated from the 2nd to 4th centuries, the same time frame our blood was introduced to their population, the same time frame the Jews were enslaved.
https://www.pinterest.com/pin/244249979766078367
Flavius Josephus also gave a description of Jesus, who was an Israelite of the Tribe of Judah:
“At that time also there appeared a certain man of magic power … if it be meet to call him a man, [whose name is Jesus], whom [certain] Greeks call a son of [a] God, but his disciples [call] the true prophet who is supposed to have raised dead persons and to have cured all diseases. Both his nature and his form were human, for he was a man of simple appearance, mature age, black-skinned (
melagchrous), short growth, three cubits tall, hunchbacked, prognathous (lit. ‘with a long face [
macroprosopos]), a long nose, eyebrows meeting above the nose, that the spectators could take fright, with scanty [curly] hair, but having a line in the middle of the head after the fashion of the Nazaraeans, with an undeveloped beard. (*
Halōsis, ii.174).”[4]
Moreover, there are overwhelming records of Jews having largely lived in Africa. Everywhere. North, East, South and West Africa. A simple wikipedia search on the Jews of Bilad al-Sudan should serve as a primer. That region, Mali, was where it has been said by Al Idrissi that the inhabitants of Berissa, Salla, Tocrur and Ghana invaded the lands of the unbelieving Jews, captured them and sold them to the Arabs, who sold them into all parts of the world. Ibn Khaldun further specified that the inhabitants of this region were Negros. It was Negroland after all. The Portuguese identified Black Jews near the river Gambia the moment they set foot in Senegal, people who were hated and beaten by the more numerous inhabitants of Senegal. The Gambia river Negroes became one of the most sought after slaves in the Americas, or at least the South Carolinas. It is a well known fact that the Igbo and Yorubas of Nigeria were taken in large numbers in the Trans Atlantic Slave Trade. Among them in Nigeria today, many claim to be Israelites and their customs and cultures line up with Hebraic values. The Europeans also identified Black Jews in Angola, along the Loango Coast. They were hated and feared there as well. They were hit HARD. Slaves from Angola ended up in Virginia, and Virginia is home to the first Black Church in America, built on a place named Israel Hill by freed slaves that claimed to be Israelites.
It's about time the world comes to it's senses. They screwed up big time. The Jews have always been Black. They are going to stay Black. And the people of the world are only putting their souls in danger by hating us, denying us our heritage and our things and the recompense we our owed for our pains, servitude, troubles and suffering. The people of the world think they are making slaves out of us, but they are making slaves out of themselves and their children. Jesus is a God of justice. He said those that lead other people into slavery will be lead into slavery. Those that massacre will be massacred. This is the patience and the faith of the Saints, to know that everything that the world has done to us will be paid back in full when the time is right. Wise up.