I posted it because it's an interesting distinction made in the same song that you think says sons of God (verse 8). I doubt Moses would have mixed two incompatible ideas in the same song
When the Most High divided the nations, when he separated the sons of Adam, he set the bounds of the nations according to the number of the angels of God. Deuteronomy 32:8
Rejoice, ye heavens, with him, and let all the angels of God worship him; rejoice ye Gentiles, with his people, and let all the sons of God strengthen themselves in him; for he will avenge the blood of his sons, and he will render vengeance, and recompense justice to his enemies, and will reward them that hate him; and the Lord shall purge the land of his people. Deuteronomy 32:43