Paternal haplogroups don't matter much for determining overall ancestry.
For example if I moved into a Chinese family in Beijing and had male children and over the centuries they had children with other Chinese people their DNA would be 99% Han Chinese but their paternal haplogroup would still be Somali and might've at this point mutated to their own distinct subclade now indigenous to China.
It's the genetic equivalent of lineage. It just tells you the migration patterns your paternal ancestors took. Autosomal DNA (your overall genetic makeup) is what makes Cushites related to each other.
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