The Law of God is situational, so for instance it is not that it is absolutely wrong to kill someone under any circumstances, but rather there are situations where killing is righteous, such as with Phinehas (Numbers 25:11) and other times where killing is murder. I spoke about priests being commanded to both to rest and making offering on the Sabbath, so one law being greater than the other is part of the system of the Law of God, not an exception to it. Again, this is also why there is much discussion in Judaism about which laws are greater, for instance, according to the Talmud, preservation of life is greater than any other command except murder, idolatry, and sexual immorality, so we must give up our life rather than violate those laws. However, if a violation would be public, especially if it is a time when the ruling authorities are seeking to get Jews to violate the Torah's commands, then we must give up our life rather than commit even the smallest infraction. The New Covenant involves the Torah being put into our minds and written on our heart so that we will obey it, which is the opposite of it being obsolete.
In Romans 3:2, Jews are entrusted with the words of God, so in other words, they were in charge of copying, maintaining, and teaching from the Torah scroll, so Romans 2:14-16 is speaking about Gentiles by nature being doers of the Torah even though they do not have physical possessions of a Torah scroll, which again is the opposite of it being obsolete.
There is no way to go from speaking about the social preferences of a group members and of groups aa a whole to establishing that everyone has a moral obligation to act in accordance with those preferences regardless of whether or not we agree with them. If people disagree about whether something is moral, then the only way to determine who is correct is by appealing to a higher standard that exists outside of human opinion, which is appealing to God and what He has revealed through His law.
Our conscience part of our fallen nature, so it is not perfect, which is why Paul said in
1 Corinthians 4:3 that he was not justified even though he was not aware of anything against himself. So our conscience helps us to live in accordance with the Law of God, but it does not replace it, and therefore is not the ultimate determiner of our spiritual condition. Our conscience is capable of warning us when our spiritual condition is in danger, but it is not God's law and needs to be informed by it in order to function correctly.
In Romans 14, there are weak Christians whose conscience is not informed in a mature way, where their conscience won't let them do what they really would be free to do, so again our conscience does not replace the Law of God. Someone's conscience can be so misinformed that their glory is in their shame (
Philippians 3:19), where both their mind and their conscience are defiled (
Titus 1:15). So the first way to destroy the work of conscience is to misinform it where you don't give it the true Law of God and the second way is to silence it when it speaks. In
1 Timothy 4:2, Paul spoke about a wounded or seared conscience, and a good indicator of this is if someone doesn't feel convicted about continuing to do what God has revealed in His law to be sin.
What grounds to you have for thinking that the king of AI was an honorable person instead of being judged for his wickedness? I don't see where the Bible speaks about the Israelites worshipping the letter, about the king of Ai being a harbinger of Christ, or about mass murder, but I do see where God commanded Ai to be destroyed because of their sin. Do you think that God was wrong to command them to destroy Ai?
Again, there is the issue that the Gospel that Jesus and Paul taught called for people to obey the Law of God, so the Gospel does not save us from "the horrors of the law", but rather it leads us to obey it. In Jeremiah 31:33, it uses the Hebrew word "Torah", which refers to all of the Law of Moses, not to just the Ten Commandments. Likewise, in Ezekiel 36:26-27, the Spirit has the role of leading us to obey the "mishpatim" and "chukim", which are the two major categories of law in the Law of Moses, not just ten of God's commandments.
The laws that God chose to give teaches us about aspects of His nature, for example, if God has commanded His people to commit adultery, then that would have revealed something very different about His nature. Likewise, the Bible often uses the same terms to describe aspects of God's nature as it does to describe aspects of the nature of God's law, such as with it being holy, righteous, and good (Romans 7:12), which is because it is His instructions for how to act in accordance with those aspects of His nature, so the view that we have of the law matches the view that we have of the giver of the law, which was certainly the case for the extremely positive view that David had of the law, however, you speaking about "the horrors of the law" is expressing an extremely negative view of the giver of the law.
All throughout the Bible, God wanted His people to repent and to return to obedience to His law and even Jesus began his ministry with that Gospel message, so if you are saying that wanting believers to be under God's law makes someone a false teacher, then you are saying that Jesus was a false teacher. It shouldn't make sense to you to think that the false teachers are those who are teaching people to repent and obey what God has commanded in accordance with the example that Christ set for us to follow instead of the other way around. Our sanctification is about being made to be like Christ by partaking in His nature through following his example of living in obedience to the Law of God. Again, the problem with the Judaizers was bit that they were teaching Gentiles how to be like Christ through following his example. In Romans 2:13, Paul says that it is only the doers of the law who will be justified. In Deuteronomy 13:4-5, the way that God instructed His people to determine that someone is a false prophet who was not speaking for Him was if they taught against obeying His law. Satan does not have the role of leading us to obey what God has commanded, but just the opposite.
While I agree that we are not under the law, Paul spoke about multiple different categories of law, so it is important to correctly determine which law he was speaking about us not being under. In Romans 6:14, Paul described the law that we are not under as being a law where sin had dominion over us, which does not describe the Law of God, which is a law where holiness, righteousness, and goodness have dominion over us (Romans 7:12), but rather it is the law of sin where sin had dominion over us. Furthermore, in Romans 6:15, being under grace does not mean that we are permitted to sin, and sin is the transgression of the Law of God (1 John 3:4), so we are still under it and are obligated to obey it.
In addition, everything else in Romans 6 speaks in favor of obedience to the Law of God and against sin. For example, in Romana 6:19-23, we are no longer to present ourselves as slaves to impurity, lawlessness, and sin, but are now to present ourselves as slaves to God and to righteousness leading to sanctification, and the goal of sanctification is eternal life in Christ, so living in obedience to the Law of God is the content of His gift of eternal life, which is in accordance with verses like Matthew 19:17 and Luke 10:25-28. So we have been set free from being captive to the law of sin in order to be free to obey the Law of God, not the other way around.
"Faith" is synonymous with "rely", so I could have equivalently said that to say that we can no longer have faith in what God has instructed is to say that we can no longer have faith in God. In Isaiah 51:7, the righteous are those on whose heart is the Law of God, so the righteous living by faith does not refer to a manner of living that is not in obedience to it. Furthermore, there are many other verses that connect our faith in God with our obedience to Him, such as in Matthew 23:23, Jesus said that faith is one of the weightier matters of the Law of God. In Romans 1:5, we have received grace in order to bring about the obedience of faith. In Romans 3:31, our faith upholds God's law. In Psalms 119:30, David chose the way of faith by choosing to obey God's law. In Revelation 14:12, those who kept faith in Jesus are the same as those who kept God's commandments. In James 2:18, he would show his faith by his works. In Hebrews 11, every example of faith is an example of works. In Hebrews 3:18-19, unbelief is equated with disobedience. In Numbers 5:6, disobedience to the Law of God is described as breaking faith, and there are many other verses that I could cite to show this connection. So the way that we choose to live testifies about whether we have faith in God to correctly divide between right and wrong through His law or whether we would rather lean on our own understanding (Proverbs 3:1-6).
Our salvation is from sin (Matthew 1:21) and sin is the transgression of God's law (1 John 3:4), so living in obedience to it through faith is intrinsically part of the concept of Jesus saving us from not living in obedience to it. Grace does not overcome law, but rather God is gracious to us by teaching us to obey it (Psalms 119:29, Exodus 33:13, Genesis 6:8-9, Romans 1:5, Titus 2:11-14. In Deuteronomy 27-28, it describes the blessing of the law for those who choose to obey it and the curse of the law for those who do not, so Jesus freeing us from the curse of the law is freeing us from not living in obedience to it so that we can be free to enjoy the blessing of living in obedience to it.
Again, in Romans 8:4-7, Paul contrasted those who walk in the Sprit with those who have minds set on the flesh who are enemies of God who refuse to submit to the Law of God, and there are many other verses that show that the Spirit has the role of leading us to obey it, that obedience brings life, and that the New Covenant involves obedience to it, so you are not reconciling your interpretation of the distinction that he made between the letter and spirit in 2 Corinthians 3:6 with many verses that say the opposite.
In 2 Peter 3:15-18, it says that Paul is difficult to understand, that those who are ignorant and unstable twist his words to their own destruction, and to be careful not to be carried away by the error of lawlessness men in contrast with growing in grace and knowledge of our Lord and Savior Jesus Christ. The Law of God is His instructions for how to grow in grace and knowledge of our Lord and Savior Jesus Christ, so we can be confident that when Paul is correctly understood that he was a servant of God who never spoke against anyone obeying the Law of God. Again, in Acts 17:11, they tested everything that Paul said against OT Scripture to see if what he said was true, so he should not be interpreted as speaking against OT Scripture. In Acts 21:20-24, Paul took steps to disprove false rumors that he was teaching against the Law of God and to show that he continued to live in obedience to it, so even in his day people were misunderstanding him as speaking against obeying the Law of God, and sadly those false rumors persisted to the third century and even to today.