Black Hebrew Isrealite shite.
They make the leap that because Egypt is on the continent of Africa, that it was an African civilization, but it has always been intrinsically connected to Mesopotamia and the Levant. They claim that the Hebrews where actually black African's that built Egypt, therefore I guess they think all Judaic symbology also applies to them? I could see the black cube (masonic/kabbalistic geometric representation of space/time-reality) applying to the idea that all religious allegory is a means for personal growth and transformation, but not sure what Ice Cube is getting at.
Egypt WAS conquered by many different people groups throughout time though, including black Nilotic peoples from Kush and Ethiopia, but it was also ruled by Aryan Hyksos, and populated by Semitic peoples over time. The RH- bloodtype is the remnant marker of the peoples of old Europe, Rhesus negative is not found in any extant ape populations on Earth, and is not found in any black sub-Saharan people groups, suggesting that the out of Africa hypothesis ignores the reality of a divergent origin of the Cro-Magnon European type genetic lineage. There where also the Hobbits of Indonesia, and Giants spread across the old world and the Americas, with pockets of elongated skull people with 30% more cranial capacity than an average modern human. The world before 10,000-BC was very much like the Lord of the Rings, or Gulliver's Travels.