So all in all you've just proven @Apollo's case.Why are you so afraid of reading Ehret? I am guessing it is because you realize the linguistic evidence is stacked miles high against your agenda of dismissing the Minority accomplishments and land claims.
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The Pwani Bantu entered Somalia in the first century A.D., after the Southern Cushites who were just leaving, but at the same time as the proto-Genale language that became Jiddu, and the proto-Doy language that became Tunni and Garee..
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In the eighth century A.D., by the time proto-Maxaa reached the Shabelle coastal plain from the north, , the proto Maay, proto Jiddu, and proto-Jubba//Tunni where also in the area, possibly also with the proto-Garee and the Pwani, who may not have yet moved up the rivers. The Sabaki speakers were south of the Jubba but must have been moving north as the 8th-9th century village site at Gezira has their typical pottery.
So the Samaales were still protos when the Bantu entered Somalia, and the hunter-gatherers still inhabited most of the north.