Antinomianism is a strange word. Though not an actual word you will find in the Bible, antinomianism itself can be found throughout. According to Wikipedia, antinomianism is a term coined by the famed reformer Martin Luther from a Greek phrase which means "against law". Luther's reference was to the Law of God, not law in general. Men are by nature antinomian, despising God's moral Law, because at heart they despise God, the One whom the Law reflects. We are by nature enemies of God and by nature children of God's wrath. Naturally, we are the walking dead. Thankfully, our Creator provided a way for us to escape this natural dilemma through faith in His Son.
When Christ Jesus the perfect Law-keeper came and died, it was so that we who were naturally lawbreakers might be infused with His Spirit and live. As a result of a Spiritual infusion of new life, men who formerly and naturally despised the Law of God, would now delight in the Lawmaker and His Law, they would become supernatural. Repentance is this change in disposition on display. "...God is now declaring to men that all people everywhere should repent, because He has fixed a day in which He will judge the world in righteousness through a man He has appointed, having furnished proof to all men by raising Him from the dead."
In short, Christ died so that we might become supernatural. Supernatural men have the heart of the psalmist in 119, they delight in the Law of the Lord. On the contrary, the Church today is largely antinomian–it is natural–and our putrefying society is a byproduct of its lawlessness. Instead of making Law-abiding citizens of God's Kingdom, the modern church's gospel is an antinomian mantra whereby men are deceived into delighting in the fact that they are supposedly forgiven, all the while still despising the moral Law of God. The modern church is largely a natural church, its converts still largely natural men. May the Lord pour out His Spirit and make us supernatural!