So essentially, your agreement with moral precept X is determined by your own personal values. Those personal values, being yours, are subjective.
Yes. My opinions on 1+1=2 are also wholy mine, but in a similar way that doesn't affect the objective-ness of the statement "1+1=2", does it?
Not objectively. But requiring one's morals to be objectively right in order to act on them is not something that a consistent moral subjectivist would actually have to do. This is what I was talking about in my last post to BibleStudent.
That's a pretty anemic morality you got there. If things are just your opinion, is that really enough weight to stop anyone else (who are just following their opinion, after all?) from doing what they want? When you hear about catholic priests raping young boys, after you get through fiercely denouncing them and their evil religion, do you add "... but that's just my opinion. Your mileage may vary." at the end?
Christianity's path out of nihilism is merely to refrain from thinking about it. Logically, nihilism is no less true under Christianity than under any other belief system. The rules of logic do not change when one becomes a Christian (or at least, they shouldn't).
Christianity's path out of morality is to assert the presence of a moral and just law-giver who anchors true morality to his good will. If you're gonna play ball in the Christian neighborhood you play by Christian rules.
Now, I would ask you the same thing. On what objective basis can you claim that murder is wrong? Pretend that I am a believer in the Christian god's existence, but that I do not agree with its morality. What would you say to me?
So you're a believer in the Christian God who disagrees with His morality? Wow dude. Let me see here, it'd go something like this...
As a believer, you understand that you are created
and He is your creator.
You are His, wholely and completely, the same way a fictional character you create is entirely yours. Just like when you create a fictional world you get to define the laws you wish, so to does He define our world. His word thus literally defines
goodness in a way you clearly do not comprehend. To not agree with Him is to not agree with gravity. How you dare
judge your eternal, righteous and good God is beyond me, but you also know he is merciful and slow to anger, so my advice to you is to repent and beg forgiveness for your petty rebellion, or you will surely suffer the consequences your folly so richly deserves.
... or something like that.