I have no idea to what you are referring. If we are speaking of the same group, all I heard is that they have the gene of the Cohanim.
I have written above, that it is possible that there are people all over who are of Jewish decent and don't even know of their ancestors. I would guess there would be many such types from Spanish and Italian backgrounds. That is not the issue. If those people find that they are Jews and want to identify with the Jewish people, they are welcome.
The issue is the direct decent of today's Jews from their distant ancestors.
What I am saying is that the Lemba and the Ashkenazim cannot both be 100% pure Jews. What is your answer to that? Are you saying that the Lemba are not really Jews because their maternal line is not Jewish? What is your answer to this question that I raise?