God does not change. He has changed the duties of men to him many times; from one rule in the Garden of Eden, to many rules before Christ, to a few simple rules again.
(Infanticide is bad/Kill those Canaanite babies!)'
Is infanticide ever a just act? If your answer is no, then what of the doctor in the emergency room that sacrifices the child the mother carries to save the mother's life? Since God is perfectly just, perfect justice here applied. Do you know that God didn't take those chidren immediately into Heaven?
periodically, does he have to flash our moral BIOS so we know what to feel?
Absolutely, it is called the Holy Spirit, an aspect of God.
John 16:7-14 But I tell you the truth: It is for your good that I am going away. Unless I go away, the Counselor will not come to you; but if I go, I will send him to you. {8} When he comes, he will convict the world of guilt in regard to sin and righteousness and judgment: {9} in regard to sin, because men do not believe in me; {10} in regard to righteousness, because I am going to the Father, where you can see me no longer; {11} and in regard to judgment, because the prince of this world now stands condemned. {12} "I have much more to say to you, more than you can now bear. {13} But when he, the Spirit of truth, comes, he will guide you into all truth. He will not speak on his own; he will speak only what he hears, and he will tell you what is yet to come. {14} He will bring glory to me by taking from what is mine and making it known to you.
Whoops. There goes the Christian's argument against abortion. If aborted children go to Heaven, then why is abortion bad? Consider how many of those souls would be lost if they were allowed to grow up. Probably near 100% of them in places like China, and at least 50% or more here in the USA. Your argument turns abortionists into heroes of the faith.
At one time those duties included committing genocide with joy. Feel the love.
If your answer is no, then what of the doctor in the emergency room that sacrifices the child the mother carries to save the mother's life?
I bet if I asked you if third-trimester abortion was ever necessary for the health of the mother you would say no. . . At any rate, these situations are typically a case of the doctor attempting to save both and failing to save one. If there were a case where the baby's death would be required to save the mother, that would fall under self-defense, although the infant would be the unwitting aggressor.
Do you know that God didn't take those chidren immediately into Heaven?
Please show me in the Bible where it is less wrong to murder someone whose soul goes to heaven than it is to murder someone whose soul goes to hell.
Absolutely, it is called the Holy Spirit, an aspect of God.
So you acknowledge that God's morality changes? Tell me, if you were a Hebrew invading Canaan and had to kill a family because your leader told you God said to, would you feel good about doing it?