Good points. Genetically, the man Jacob/Israel had 12 sons and then Joseph’s inheritance was a double portion to Ephraim and Manasseh. Many peoples that are descended from these lines do not even know their heritage. Those ‘tribes’ migrated and spread all over the world. When Jesus/Immanuel (God with us) laid down His life as a perfect sacrifice He rent the veil and opened up salvation and God’s promises to ‘whosoever believeth in Him’ of any genetic race. Some tribes have lost the promises on a national level, but Jesus opened up salvation and the promises to each of us individually based on our willingness to believeth in Him, regardless of nationality or race.