Then God is not needed. If not, then whatever laws God issues are just and to be a Christian you must follow them - even if you disagree with them. If God somehow made it 100% known that to be a Christian, you have to punt a kitten everyday, you, as a Christian, must do so, whether you find it reprehensible or not. In the latter case, you are exactly like the dog with the duck in his mouth. An amoral agent who only follow rules so he won't get booped on the nose with a rolled-up newspaper.
There aren't objective-by-themselves morals. There are subjective systems of morality, and the morality in them would be objective in that system. One example would be a system that placed well-being as the goal of morality. I don't like having X done to me by other people so I (and others) shouldn't be able to do X to other people, where X is murder, steal from, etc. etc. etc. This is a very simplistic system and would need more to shore it up so we don't get people saying, "I don't like hearing Nickelback so others shouldn't hear Nickelback," but it would form a basis for a system of morality better than anything in any holy book.
TlalocW
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