The irony of your statement is that you display the ignorance of the Ten Commandments so widespread among Christians. Exodus Chapter 20 starts with a list of rules that have come to be thought of as the Ten Commandments by most Christians. Let's pretend for a moment that these really are the Ten Commandments which you claim are the basis for "all our civil law". Let's list these laws:
The problem for you is that the commands continue in Exodus Chapters 21, 22 and 23 where we learn about seducing virgins, selling our daughters into slavery and how it's acceptable to beat your slave to death as long as the slave doesn't die for a couple of day because, after all, the slave is your property. These chapters list an enormous number of rules for the Hebrews to follow. There is no mention of any commandments or stone tablets until chapter 32 when Moses finally brings them down from the mountain. But we aren't told what these commandments are. Then Moses sees the people worshipping an idol and, after he begged YHWH not to turn his wrath on the people, he turns his wrath on the people, smashing the tablets and gathering the Levites to go on a killing spree, slaughtering 3000 of their fellow tribesmen. Then Moses makes friends with YHWH again and in chapter 34 he goes and gets the replacement tablets, finally identified as the Ten Commandments, which consist of eight rewritten laws from chapter 23, one from chapter 13 and one brand new one.
You can throw out accusations of ignorance, but the facts, and your lack of knowledge regarding them, speak for themselves.
Lets see if this helps.
I am the Lord your God
You shall have no other gods before me
You shall not make for yourself an idol
Do not take the name of the Lord in vain
Remember the Sabbath and keep it holy
Honor your father and mother
You shall not kill/murder†
You shall not commit adultery
You shall not steal††
You shall not bear false witness against your neighbor
You shall not covet‡ your neighbor's wife
You shall not covet‡ anything that belongs to your neighbor
Taken from here
http://en.wikipedia.org/wiki/Ten_Commandments where it really explanes this:Sroll down to here.
Division according to different religions
Here are the ones that are civil: even today.
You shall not kill/murder†
You shall not steal††
You shall not bear false witness against your neighbor
The rest keep us out of trouble and they have to do with belief and faith of what is good.
This is what you are using against Christians to get your point across, and anyone can see that from the basics of these just like us today, they the Hebrews, added to them just as we have, to cover all morality, in the culture of the times which should in theory and what is written become better.
I think it has except the acknowledgment by non-believers.
The basics had more to do with what God wants for us, which is where the most addendums are...that you have a problem with, especially.
Punishment or reward comes from men and God.
Men uphold three of them and God upholds all of them.
But if you are a believer then the basics make perfect sense.