Interesting case in the Supreme Court today about whether the government can display the Ten Commandments without violating the First Amendment ("Congress shall make no law respecting an establishment of religion...")
Proponents of putting the Ten Commandments up must argue that they're not religious, because if they were, the government would be endorsing religion. Of course, it's blindingly obvious that they're religious (see, e.g. "I am the Lord thy God..." and "Thou shalt have no other gods before me.") If they weren't religious, no one would be fighting so hard to keep them up.
It's impossible to deny with a straight face that organizations have put them up because they come from the Bible. If they want to put up some secular monument honoring the development of law or something, switch the Ten Commandments with the Bill of Rights! Easy solution! It's even ten and ten!
But no one is putting up 2.6 ton stone monuments carved with the Bill of Rights.
To me, this is an easy case. The government can't put up the Ten Commandments. Yes, they are partially (but not entirely) carved on the Supreme Court's building, but that carving also includes Confucius, Solon, Hammurabi, Napoleon, and various other law givers. But if it's only the Ten Commandments, it's unconstitutional.