Complex sentence: Malachi 1:3 claims that God laid waste the heritage of Esau and fed them to dragons, so, if the Biblical narrative is correct, those Edomites who were not already dead eventually perished in this manner.
Split into simpler sentences: Malachi 1:3 claims that God laid waste the heritage of Esau and fed them to dragons. If the Biblical narrative is correct, those Edomites who were not already dead eventually perished in this manner.