Not all blacks are hebrews, only bantus. There are 5 races in Africa, you have , nomadic desert Bedouins (arabs), berberes (bar abbas, Moabites : sons of fathers) , cushites( afar, bushmen, pygmies) , nilotics (Canaanites, luo (obama'dad), massai, Tutsis, Ethiopians, somaliens, tall with European hairs and nose)obama is an hamite. Then u have bayithu, or bantus( lemba, hutus, bacongo, yoruba, igbo, makua, bassa...), only Bantus suffered slavery, the word Bantus derives from Hebrew word bayithu-ELAH (usually bayit בַּיִת : house of God Genesis 29:16-19 ).
When Bantus came to Africa, they controlled west and east south Africa,they took the forest to pygmies, to avoid the spreadin'ISLAM those from west, joined Bantus GALA, in the forest, (a shield against Muslims horses) they called themselves bar kongo, or bakongo, derives from " kongolo" is a town in Tanganyika Province in RDC. U can google it.
So Bantus had KONGOLO in Mali, Ghana, Nigeria, Cameroon, Luanda :The word "kongolo" anciently "koungelo" derives from 2 hebrew words, you have "kun" meaning כּוּן establish and "giloh" גִּלֹה ( gelo, golo) means Exile, so the word KONGOLO, or KOUNGELO means set up in Exile, today became CONGO
All slaves were Bayithu or bantus, they came from (Republic of Congo, Democratic Republic of Congo and Angola): 39.4%,Southeastern Africa (Mozambique and Madagascar): 4.7%,Bight of Biafra (Nigeria east of the Niger Delta, Cameroon, Equatorial Guinea and Gabon): Bantus slaves came from 14.6%,Senegambia (Senegal and The Gambia): 4.8%,Upper Guinea (Guinea-Bissau, Guinea and Sierra Leone): 4.1%,Windward Coast (Liberia and Côte d'Ivoire): 1.8%,Gold Coast (Ghana and east of Côte d'Ivoire): 10.4%,Bight of Benin (Togo, Benin and Nigeria west of the Niger Delta): 20.2%
Esau and Ishmaelites led us captives on the 4 corners of the earth ISAIAH 11:12, in Europe, Americas, many islands, Middle east , bantus called themselves yahoundés : Yĕhuwd יְהוּד (Aramaic hebrew) meaning "Judah", you can google the capital of Cameroon, others kept the samba, (Shabbat in Brazil, Cuba) others were killed if they kept the samba(shabat)