First of all I want to thank you Rahvin for an absolutely brilliant post. I have c&p'd it to save as a reference, just amazing.
Your first point nails an important concept that cannot be stressed enough:
Rahvin writes:
False. The concept of objective right and wrong ceases to exist, but that doesn't matter - the assertion that morality is relative includes the rejection of an objective moral standard and the aceptance that ethics are subjectively determined by human beings.
This addresses the classic "bait and switch" tactic unscrupulous theists use when discussing the 'problem of evil'. Get your opponent to admit that some things are right and some things are wrong (subjective morality) then switch to objective morality as if synonymous. I think Ravi Zachiarias does this best in his famous and constantly repeated anecdtote:
Ravi Zachiarias writes:
Ravi Zacharias tells of a student who stood up in a lecture he was given and shouted "There's too much evil in the world! God can't exist!" Ravi asked him to stay standing for a little while. This would only take a moment.
He said "When you are saying that evil exists are you not admitting such a thing as good?" The student thought and said he guessed so. Ravi continued, "And are you not then saying there is a moral law on which to differentiate the two?"
Returning to his student he said, "So if there is a moral law aren't you saying there is a moral law giver? If there is no moral law giver, there is no moral law. If there is no moral law, there is no recognizable good. If there is no recognizable good, there is no recognizable evil. Thus, you are using evil to disprove that which you are trying to prove. What was your question?"
This exchange is often presented as a "checkmate!" proof of god, but is really quite a flawed argument meant to impress the already convinced.
To the OP, I find it sad but not surprising that fundies are hesitant to declare rape (or slavery, etc) as immoral. When confronted with demonstrations of their deity's apparent condoning of said immoral acts they immediately become moral relativists ("well those were different times...."). Anyway, thanks again for the post!
Doctor Bashir: "Of all the stories you told me, which were true and which weren't?"
Elim Garak: "My dear Doctor, they're all true"
Doctor Bashir: "Even the lies?"
Elim Garak: "Especially the lies"