Non-theonomists do not disregard the OT or GOd's law, they just believe that the switch in focus from the CIVIL GOVERNMENT that was also the church in Israel to the CHURCH in the NT calls for a view of general equity that is more in keeping with Paul's injunction to excommunicate than with the encouragement of execution.
A favorite bait of the theonomists is to say that one must choose either their form of theonomy or else they do not respect the law.
According to your thinking there can now be no civil punishment for any crime at all, because if your view is taken to its logical conclusion then the role of civil government is defunct as only church discipline now remains.
However, your hermeneutic is proved erroneous by the fact that Paul says the civil magistrate is to inflict God's wrath on the evil-doer (Rom. 13). Therefore, the fact that the incestuous man was excommunicated by the church, does not prove that he should not also have been executed by the state.
I would counsel you to
try to understand why we have such serious problems accepting your hermeneutic at this point.
Why does Paul never say "excommunicate him and hand him over to the rightful authorities then."
God ordained civil gov't in Genesis even before He called Abraham. We do not need the OT to know how the civil gov't runs; civil gov'ts have been running since history began. God has, however,matured His people and His revelation to the church, however, has been gradually enveiled. We do not need GOd's special revelation to know that murder is wrong and theft is wrong, even the heathen with no knowledge of the Scripture can know these truths. And their pagan gov'ts can punish these sins even without a Biblical basis.
We are all theonomists here in a little t sense, and we need not become BIg T Theonomists. We are to obey the never-ceasing moral law as general equity requires but we need not mistake or conflate the moral and the judicial laws of the OT. General equity for execution is already proven by Paul to be excommunication, and Paul again nowhere commands Scripture to turn anyone over to the civil court (we are not even to sue other Christians in the court).
We should work for rightousness in all realms, but Jesus was largely uninterested on politics. He had people come to him trying to get an inheritances and he turned them away, he paid his taxes, etc, and said that his kingdom was not of this world. Paul spoke of excommunication. The Roman church and the Magesterial Reformers, however, favored MUCH more than excommunication on occasion and this is to their shame. To have doctrinal errors punished by the State is impractical, impossible and makes a Christian majority an oppressor rather than a liberator. The Crusades, the inquisition and the Protestant burning of supposed witches all stemmed from an over-eagerness of those who claimed Christ to get involved with the secular sword.
P.S. Daniel Ritchie: Please don't pull out of this argument, your responses are profitable. Thanks for them.
Some more objections against theonomy, from a past post by Poimen (thanks for posting this great summary). These are good things to ask about how we discuss punishment in relation to OT law:
Some food for thought These are the best (in my opinion) arguments compiled from the book Theonomy: A Reformed Critique
Tremper Longman III "God's Law and Mosaic Punishments for Today"
1) Israel and American cultural differences
-should we stone people or use a firing squad?
-should we put up parapets around roofs (Bahnsen)? If so, then we have moved beyond the theonomic hermeneutic to a "general equity"
-what happens when someone steals my car? do I get four in return? (Exodus 22:1).
2) Israel and American redemptive differences
-Israel's situation in God's redemptive plan is unique (Deuteronomy 7:6)
-Israel, in traditional Reformed understanding, is the Church in the NT, which does not, nor is commanded to, punish temporally, but rather through excommunication
Specific abrogation of OT sanctions
I Corinthians 5:5: The sin of adultery is recognized, but not the application of its punishment (cf. Matthew 5:31). "The gravity of the offence is established by the fact that the extreme of ecclesiastical censure is pronounced upon it. But the sanction by which the gravity of the offence was recognized and penalized in the Old Testament economy is revoked" (Murray, Principles of Conduct , page 54.) Similarily, Murray remarks that for the sin of adultery, a stoning was prescribed in the Old Covenant. However, in Matthew 5:3, Jesus allows for divorce in these cases. This is in light of the fact that the spiritual significance is known more fully as to the heinousness of sin, and therefore the punishment is abrogated, it being given originally to demonstrate God's hatred of sin.
Bruce Waltke: "Dispensational and Covenant Theologies"
The theonomist exegesis of Matthew 5:17 is fundamentally flawed because Jesus does in fact set aside the laws of Old Covenant Israel: Mark 7:18-19; as well as the New Testament Church: Acts 15:19-20; Colossians 2:14-17.
The laws of the OT were, primarily to make the people of Israel holy (Exodus 19:5-6). Similarily, the New Covenant law is given to believers, who are expected to keep it, by asking the Father for the good gift: the Holy Spirit (Luke 11: 13). Theonomy claims that (a la Deuteronomy 4:6) the laws were to be a model for the nations around them. However, "our Lord intends nations to come under his sway, not apart from the Gospel but through it (cf. Mt 28:18-20)." Deuteronomy 4:6 should read as does Proverbs 14:34.
The role of church and state were intertwined in the Old Covenant, even though Bahnsen claims that they parallel the separation of church and state in the New. "Christ does not give the keys of the kingdom to Ceasar, nor the sword to Peter before the parousia. The church is the new nation" (I Pe 2:9). Clowney, "The Politics of the Kingdom,"WTJ (1978-1979): 306. As quoted by Waltke.
"Bahnsen underestimates the role of natural law, which is sufficient to either commend a person toward God or condemn him before God (Ro 2:15)."
Dennis E. Johnson "The Epistle to the Hebrews and the Mosaic Penal Sanctions"
"It is no accident of history that the New Testament speaks more often and more explicitly regarding the responsibilities of subjects to political authorities (Mt. 5:41; Ro 13:1-7; I Ti 2:1-2; Tit 3:1; I Pe 2:13-17; et al.) than it does regarding the responsibilities of political rulers (Ro 13:4)." This is significant, because "when the time had fully come" (Gal 4:4), God was pleased to bring about his greatest victory, not in a country, people, or laws, but in the god-man Jesus Christ, and thus to his body, the church.