The more I read RDKirk's response, the better I like it. But I want you to notice that he says "morality is subjective TO God". And I'm glad you agree with that, but his response does not mean that morality is subjective TO humanity. We could very easily fall into the "Euthyphro Dilemma" deception here, so maybe now is a good time to address it. This "dilemma" was proposed by Plato and essentially asks "Is a thing good simply because God says it is? Or does God say a thing is good because of some other quality it has?" The problem is that this is not really a dilemma because there is a third option in that morality is not grounded ultimately in God's commands, but in His character, which then expresses itself in His commands. In other words, whatever a good God commands will always be good. However, when Christians such as myself claim that there are "objective moral values and duties", we are referring to morality from OUR frame of reference. So, from RDKirks' POV, it would be incorrect to say that rape had an "intrinsic" negative moral value, and I would agree with that. To say that it did, would lead one to Platonism, which is doubted by most. But I am not arguing from that POV. I am saying that a good God has expressed himself through his word and declared that rape has a negative moral value attached to it.
So, I take it that you agree that "raping little girls is definitely something that has a negative moral value attached to it". If so, I'm glad that you recognize that and would hope that you see the implication that it leads to. If rape did NOT have a negative moral value attached to it, then God would not exist. Some atheists recognize this truth and because they refuse to accept that God exists, resort to claiming that rape is neither good nor bad, but simply a preference of society, just as antisemitism was a preference in the Nazi Germany society. I hope you see this. There is a "price to pay" for believing that God does not exist. As Dostoevsky is reported to have said, "If God does not exist, everything is permitted".
So, in case you've never seen this, I'd like to present you with the moral argument for God:
1. If God does not exist, objective moral values and duties do not exist.
2. Objective moral values and duties DO exist.
3. Therefore, God exists.
As we agree, rape definitely has a negative moral value attached to it. Yes, rape is subjectively "wrong" TO God, but it is objectively "wrong" from humanity's POV. The question is "how did that negative moral value attached to rape get there?" Again, I contend that a good God has expressed himself through his word and declared that rape has a negative moral value attached to it.