One must be very careful to understand about God's laws according to the New Covenant, since our Lord Jesus came and died upon the cross for the remission of sins of those who believe.
God's laws included ordinances, statutes, commandments, and judgments. What our Lord Jesus nailed to His cross mainly were the 'ordinances' in the law. That involved the things involving blood sacrifices, religious ritual and ceremonial laws, etc. Our Lord Jesus did not nail everything to His cross.
Notice what Apostle Paul taught about God's laws according to The Gospel entrusted with him...
1 Tim 1:8-11
8 But we know that the law is good, if a man use it lawfully;
9 Knowing this, that the law is not made for a righteous man, but for the lawless and disobedient, for the ungodly and for sinners, for unholy and profane, for murderers of fathers and murderers of mothers, for manslayers,
10 For whoremongers, for them that defile themselves with mankind, for menstealers, for liars, for perjured persons, and if there be any other thing that is contrary to sound doctrine;
11 According to the glorious gospel of the blessed God, which was committed to my trust.
KJV
No one is saved by following and keeping God's law. We are saved only... by His Grace through His Son's Blood shed upon the cross.
But does that mean God's people no longer need God's laws? Of course not, because it's easy to see how the wicked, etc., are still very much in need of it, because according to Apostle Paul, the wicked is who the law was made for, in order that God's people might have peace and prosper.
According to the prophecy Jacob gave his twelve sons all the way back in Genesis 49, Judah was to be keeper over God's law until "Shiloh" (Christ) comes to gather His Church. And it still is mainly in their hands today, even though many of them have allowed corruptors to creep in among them today that are changing the law and the times.