We establish the moral law. Romans 13 talks about how we when we love our neighbor, we fulfill the law of not coveting, stealing, etc. The OT Law as an entire package is no longer binding. For Jesus changed things. He said turn the other cheek instead of an eye for an eye. The Lord God told Peter in a vision to break the OT Law and eat unclean animals. Christians today are not seeking to rebuild the Temple to reinstitute the Temple sacrifices again (Which was a part of the Law).
So did the spiritual law change, or did Peters perception of what God was truly saying in the law change when the Lord revealed to Peter he was speaking of men, and not unclean beasts? The problem is the carnal mind cannot perceive what the Spirit is saying in many parts of the Old Testament law, so it is easier for them to just say it is void, not worth anything, even some portraying the law as evil. But we are told the law is holy and good.
Jesus said not one jot or tittle shall pass from the law till all be fulfilled, meaning many parts of the law are also prophetic; but not many can see this, nor understand this. Now I agree love fulfills the law, and no man is justified by the works of law. But I also find it dangerous doctrine to try make the law look like sin, or try to make the law of no purpose or benefit.
I believe instead of people preaching against the law of God (Gods law is good, and holy) people should rather spend more time preaching against evil works, and sin and all manner of unrighteousness. And instead of trying to dismiss certain aspects of the law, let us rather by the Spirit try to understand what the Lord is truly saying in the law of Moses.
Beware of preaching against the law.
Matthew 5:19
Whosoever therefore shall break one of these least commandments, and shall teach men so, he shall be called the least in the kingdom of heaven: but whosoever shall do and teach them, the same shall be called great in the kingdom of heaven.