You are in ignorance of the new and old law. You do not know that Christ began a new testament. Jesus has established His will and testament. This is how He nailed the law of Moses to His cross and we still are under law today.
Hebrews 9:15-17
And for this reason He is the Mediator of the new covenant, by means of death, for redemption of the transgressions under the first covenant, that those who are called may receive the promise of the eternal inheritance.
For where there is a testament, there must also of necessity be the death of the testator.
For a testament is in force after men are dead, since it has no power at all while the testator lives.
Hebrews 10:9
Then He said, Behold I have come to do Your will, O God. HE TAKES AWAY THE FIRST THAT HE MAY ESTABLISH THE SECOND.
You need to be taught that Jesus has established a new better covenant that ALL are under today. Jesus abolished the old covenant and has brought in a new testament.
We are now subject to Christ's law. This is the law ALL OF MANKIND is under today and till Jesus returns.
James 1:25
But he who looks into the PERFECT LAW OF LIBERTY and continues in it and is not a forgetful hearer but a doer of the work, this one will be blessed in what he does.
Christ's law gives us liberty! The old law kept the Jews in bondage!
Galatians 5:1
Stand fast therefore in the liberty by which Christ has made us free and do not be entangled again with a yoke of bondage(old law of Moses).
Now that you are educated in the new law of Christ that ALL are subject too.
Galatians 6:2
Bear one another's burdens and so fullfil the LAW OF CHRIST.
You can now understand how we can be under law and Christ nail the old law to His cross,
Ephesians 2:15
Having abolished in His flesh the enmity, that is, THE LAW OF COMMANDMENTS CONTAINED IN ORDINANCES, so as to create in Himself ONE new man from the two (Jew and Gentile) thus making peace.
And that He might reconcile them both to God in one body through the cross, thereby putting to death the enmity.
Christ fullfilled, abolished, ended the old law, He nailed it to His cross!
Colossians 2:14
Having wiped out the handwriting of requirements that was against us, which was contrary to us. And He has taken it out of the way, having nailed it to the cross.
The handwriting of ordinances is the old law. True Biblical doctrine teaches there is a change of law,