Re: Quran is full of moral stories and metaphors
I’m not expert of Arabic language, but if we look at Urdu word ‘ajza’ derived from this very ‘Juz’aa’ we know it refers to part and pieces. We never refer to whole things (birds / animals) as Ajzaa.
There are many translation in the link you provided which refer to cutting of birds into pieces.
Yusuf Ali (Saudi Rev. 1985) : Take four birds, draw them to you, and cut their bodies to pieces. Scatter them over the mountain-tops, then call them back. They will come swiftly to you.
[Al-Muntakhab]“Tie them, kill them, cut them into pieces, then place each piece on a different hill, and call them to you and they shall swiftly take wing, and this should cause you to realise that Allah is indeed Azizun and Hakimun”.**
Ali Ünal **"Then take four of the birds (of different kinds), and tame them to yourself to know them fully. Then (cut them into pieces and mix the pieces with each other, and) put on every one of the hills a piece from each, and then summon them, and they will come to you flying.
Besides, how could tamed birds coming to the person who have tamed them could prove the point which was asked by Ibrahim (AS)? This is very common amongst people who tame pigeons. The question was of making dead alive so without cutting into pieces how the question of making dead alive fulfilled?