Cyril of Alexandria : This shows them to be those who detest God, having a sick hatred for him and ready to eat blood. There was nothing new in this; it was a long established custom. For you are the ones who have from long ago called on idols under a leafy tree.… Your guilt is that you first think to kill your firstborn and then offer libations to impure demons and soulless idols; so slaying will also be your portion and your lot.… Should I not be angry with these people? Is there not a good cause for my anger? — COMMENTARY ON Isaiah 5:3.57:5-7