You state:

»Mr. Ohlman is arguing that without theonomy, we have no standard by which to determine what laws to legislate in civil society.

No, actually I don’t. As you know, I assume, theonomic theologians state that the choice is between ‘theonomy and autonomy’… ie between God’s Law and man’s law… obedience to God and rebellion to God.

So what we state is that without basing your standard for civil law on God’s Law, you base it on man’d rebellion against God’s law.