Jesus said He had come to fulfill the Law.
17“Do not think that I have come to abolish the Law or the Prophets; I have not come to abolish them but to fulfill them. 18I tell you the truth, until heaven and earth disappear, not the smallest letter, not the least stroke of a pen, will by any means disappear from the Law until everything is accomplished.
And this was accomplished by Jesus dying on the cross:
When he had received the drink, Jesus said, “It is finished.” With that, he bowed his head and gave up his spirit.
We see this also when Jesus was speaking to the disciples in Luke 24:44-48,
44 He said to them, “This is what I told you while I was still with you: Everything must be fulfilled that is written about me in the Law of Moses, the Prophets and the Psalms.“
45 Then he opened their minds so they could understand the Scriptures. 46 He told them, “This is what is written: The Christ will suffer and rise from the dead on the third day, 47 and repentance and forgiveness of sins will be preached in his name to all nations, beginning at Jerusalem. 48 You are witnesses of these things.
The Law was intended to guide us to Christ, and that now that we have faith, we are not under the supervision of the Law according to Galatians 3:23-25
23 Before this faith came, we were held prisoners by the law, locked up until faith should be revealed. 24 So the law was put in charge to lead us to Christ that we might be justified by faith. 25 Now that faith has come, we are no longer under the supervision of the law.
The New Testament states that the Law has been cancelled and God has forgiven our sins. Colossians 2:13-14
13 When you were dead in your sins and in the uncircumcision of your sinful nature, God made you alive with Christ. He forgave us all our sins, 14 having canceled the written code, with its regulations, that was against us and that stood opposed to us; he took it away, nailing it to the cross.
Indeed, we see Jesus abolished “the law with its commandments and regulations” in Ephesians 2:14-15. Although I think he was speaking of the requirements for man to follow the Law since its requirements were fully met by Christ.
14 For he himself is our peace, who has made the two one and has destroyed the barrier, the dividing wall of hostility, 15 by abolishing in his flesh the law with its commandments and regulations. His purpose was to create in himself one new man out of the two, thus making peace,
We see in Romans 10:4 that “Christ is the end of the law”.
4 Christ is the end of the law so that there may be righteousness for everyone who believes.
We are told in Romans 7:6 that “we have been “released from the law”. In fact, “we serve in the new way of the Spirit”, rather than “the old way of the written code.”
6 But now, by dying to what once bound us, we have been released from the law so that we serve in the new way of the Spirit, and not in the old way of the written code.
We see in Hebrews 7:18 the same thing:
18 The former regulation is set aside because it was weak and useless
In every case, these are synonymous phrases to the fact that we are not required to follow the Law.
In fact, if we try to keep the Law, and break one part of it, we are guilty of breaking all of it, according to James 2:10.
10 For whoever keeps the whole law and yet stumbles at just one point is guilty of breaking all of it.
Yet it is evident people do not sacrifice at the temple, since it was destroyed in 70AD. So if those who follow the Law do not make offerings and sacrifices at the temple, are they not breaking the Law? Instead of worrying if we are breaking one of the 613 laws in the Mosaic Law, we are under a new set of regulations – those of faith. As such, we should trust in Christ.
22 Let us draw near to God with a sincere heart in full assurance of faith, having our hearts sprinkled to cleanse us from a guilty conscience and having our bodies washed with pure water. 23 Let us hold unswervingly to the hope we profess, for he who promised is faithful.
So no, technically, the Mosaic Law has not been abolished, but it has been fulfilled. Since it was fulfilled, its requirements no longer apply. Thus practically, it has been abolished. As such, we are not required to follow it. But even so, if you think you can follow the Mosaic Law and not replace the grace of God with the following of these laws (Galatians 1:6-8), then feel free to do so. Paul didn’t think it was something you should do, but you should be convinced in your own mind. Likewise, those who are convinced that there is no requirement to follow said law should show love to those who do.