Apollo
VIP
I agree the T1a in the Iraqw could have come from the Sudan. But that does not explain the near 100% T1a showing in the Dir. And you have not touched on J1. Only info specific to the Maay speakers is going to settle this.
South Cushites came from Southeast Ethiopia/Southwest Somalia, not Sudan.*
South Cushitic languages are closest to Lowland East Cushitic languages of which ethnic Somalis are the prime ancestral population (Western LEA Cushites are admixed with Omotics - ethnic Somalis are not, especially not those from Somalia proper).
I don't care whether T1a exists in the Maay, because it is irrelevant as it doesn't change anything. Even if they had 95% T1a like the Dir, it would still make them Somali. You don't even understand how paternal bottlenecks work and here you are pretending to understand genetics.
*Depending on the timeframe.