Zumaale, your tendency to regurgitate evidence from the same study is well noted but it adds nothing of an intellectual calibre to the discussion. Many arabs in sudan, central africa and so forth are clearly not descedants of middle eastern arabs rather they are people who adopted arabic language and islam.dna may prove that they are not from the middle east but those people are still culturally and linguistically arab. If somalis had adopted Arabic language today they would be recognised as an arabic tribe regardless of what dna says or their skin colour.
that said, your argument is more logical than those being espoused by the racists abdi johnson quoted.black arabs have existed for thousands of years.their argument is based on white supremacist ideals.reminds of those racists who said qaddafi had brought blacks with him when many libyans are black people.
My contention is with the racist
Zuumale posted material about information relating to the Y DNA which you inherit from your father. So his data pretty much says that somewhere in our ancestry (great great great....grandfather) we have ancestor we share with these pseudo Arabs.
That says only a tiny bit about our complete genome which has millions of SNPs and says virtually nothing of our race.