I'm unconcerned with haplogroups. N1a1a3 can also be found in Neolithic Germany and among Habeshi who we share little with.
I also do not believe we are like those in the Sahel. That's an oversimplification. Proto-Nilosaharan is not the same as West African (which I know I'm aggregating together) and Northwest African is not the same as Northeast African. Our various inputs are not the same and it would be impossible to recreate.
Well, I did emphasize the differences by pointing out proto-Nilotic and West African are tens of thousands of years apart and that Maghrebi and Egyptian are also pretty separate though more closely related. We're mirror images, though. That seems apparent.
But also, walaashay, Habeshis and us having little do with each other? You sure about that statement? That aside, you are correct. Autosomal DNA is where it's at and in that you are a pure Geeljirina.
And besides, T1a and N1a are both ultimately "Somali" haplogroups. Their ancient or prehistoric roots are irrelevant. They are found in abundance in autosomally quintessential Somalis today as well as some of our neighboring related ethnic groups so there's nothing foreign about having them, really. Especially N1a which is probably well over 5,000 years old in Horners.