Hello, cofty,
I hope you are well.
Respectfully, the scripture doesn't say "Kill your son" the story has God saying " offer your son as a burnt offering" to Abraham.
The Hebrew word for sacrifice, zebach, was graphic and bloody in its root.
The word for burnt offering, olah, was more spiritual and had no root connecting it to killing or to blood. In fact the two words are so different that they occur side by side frequently in the OT. They are by no means interchangable.
The story of Abraham and Isaac ( it has been said) has been left unedited by whatever person or persons who homogenized most of the OT . If in this God-story the Good One had told Abraham to kill Isaac then there would be nothing to discuss--ever--about the character of God. God would be a rotten, a tricky, lying SOB to his friend, Abraham. He would be no one to trust. It is the pivotal OT story.All the other stories can vanish and for me they largely have.
But in the interest of accuracy ir must be said that God never commanded Abraham to kill and burn his son.
Maeve
ps. thanks for kind thoughts on my bad day.