Such laws can be justified on more than one basis. Laws prohibiting murder, theft, etc. existed independently of and prior to the writing of the Ten Commandments. The ancient Greeks, for one, had never heard of the God of Abraham, but somehow managed to come up with the same ideas.
Also, it's a lot different admitting Biblical law as an inspiration for law, as opposed to using Scripture directly as law. There are a helluva lot of other laws in the Old Testament that don't belong in a free society.
Snidely
Maybe, but they are still based on someone foisting their morals on other. Every law we have is based on that very premise.
You would have to clarify whom you mean when you say "Ancient Greeks." I believe the Spartans had no compunction against murdering a child if the child were deemed to be of no value to the city-state.
Either there is an absolute moral law, or there is not. All you have done is said that someone in history agreed with you, therefore what you have found is a univerally recognized moral law.
Shalom.