Why?
Egypt is a LONG way away from Somalia and there's a huge-ass desert between them. You can see Greece, Turkey, and Syria are much closer - even if you were going overland, it would be way easier for someone from Cairo to get to Syria or Turkey than to get to Greece. And once shipping became possible (Egyptians have had boats for 5,000 years), then travel to Greece and even Rome would be relatively simple.
Just looking at a map and georaphical features, you'd expect northern Egyptians (what they call "Lower Egypt" because they're socially oriented around the lower Nile and Mediterranean Sea) to group with northern Libyans, Hebrews, and Arabs in general, while you'd expect southern Egyptians (what they call "Upper Egypt" because they're socially oriented around the upper Nile and highlands) to group with southern Libyans and northern Sudanese. And that's exactly what you get. Northern Sudanese, from that side of the desert, look more like Arabs than like Ethiopians. But South Sudanese look straight Black. That's where the natural geographic divide is, down around Ethiopia, south Sudan, and Chad. It would make no sense geographically or historically for there to have been some massive divide between Israel and Syria/Iraq or whatever.