Ghana’s Ambassador to Namibia and Botswana, Alhaji Harruna Attah, must stop “betraying” and “backstabbing” late vice president Alhaji Aliu Mahama with his “irritating and backward” claims that the late politician was discriminated against by the New Patriotic Party (NPP) because he was a northerner, the Alhaji Aliu Mahama Foundation has warned.