The evil will or heart of a man can be restrained by law, in that man can be afraid of the consequences of disobedience. We all slow down a bit on the freeway when we see a patrol car and we are always mindful of speed regulations. The fact of law and the strict enforcement of law are restraints upon man's sinful inclinations. Man can be saved only by the grace of God through Jesus Christ. Now humanistic law has a different purpose.
Humanistic law aims at saving man and remaking society.
For humanism, salvation is an act of state. It is civil government which regenerates man and society and brings man into a paradise on earth. As a result, for the humanist, social action is everything. Man must work to pass the right set of laws, because his salvation depends upon it. Any who oppose the humanist in his plan of salvation by law, salvation by acts of civil government, is by definition an evil man conspiring against the good of society.