The Nilotes in subject are actually the Karamojong of Uganda who were found to carry T-M70.This would only be noteworthy if the Nilotic populations in question were in South Sudan; the Maa (Maasai-Samburu) have extensively mixed with Cushitic populations. Don't get me wrong, the Maasai-Samburu are my kin, but they're not pure Nilotes.
Its a different clade from which the South Cushites like Rendille and Samburu carry.