yes nigers will have berber input. Humans are interconnected and have always mixed. you telling me somalis living amongst the bantus for 1000s of years but have no bantu blood? Theres nothing wrong with some admixture. We are somali now tho any foreigners have been assimilated into our culture. Being mixed doesnt decrease your somaliness. We dont have to start claiming people now.So does that mean that the people of Niger are all mixed, just because they are right under Algeria?
And many cultures are influenced by other people. That doesn't prove anything whatsoever.