Funny all this reading and mangling at the same time.
Isaac was not a child when Abraham was called to sacrifice him. Do you remember what was given in place of the human sacrifice? Did you take note that this was a specific command to a specific individual and not to be repeated? Compare Jeremiah 7:31. Also, the Muslims believe that Abraham was called to sacrifice Ishmael, also not a child.
As for “rape not being morally wrong”, thanks for admitting you never read Deuteronomy 22:25.
Yes, I have, many times. It never says it's morally wrong to rape a woman, it says that if a betrothed woman and a man have sex, they are to be killed, but if it was rape, they spare her. There is no additional stigma mentioned against him for the rape, she is merely excused from having participated. Sex is the crime, not rape. And note, she has to be married or betrothed. Know why? Because the crime is not against her, it's against the man whose property she is. That's Middle Eastern mentality in big, bright lights.
This is proven by reading a little further to 22:29 wherein we find if she is not betrothed, she has to marry her rapist. Clearly rape is no problem to the God of the Middle East. Never has been. You can rape your wife, rape your slaves, rape a virgin and make her marry you. You just can't sully other men's property.
And by the way, can you point to the chapter and verse that tells exactly how old Isaac and/or Ishmael was? Then we can settle that one.