Jesus was sent to the covenant people only, Israel.it was not addressed to me but I will answer nonetheless, I want to go directly to Jesus Himself on this because His words settle the question more clearly than anything else.
You included this verse in your own post:
Think not that I am come to destroy the law or the prophets. I am not come to destroy but to fulfil. (Matthew 5:17)
But then the conclusion drawn contradicts what Jesus said in the very next breath:
Whosoever therefore shall break one of these least commandments and shall teach men so he shall be called least in the kingdom of heaven. (Matthew 5:19)
That is Jesus speaking — directly to His followers — warning against teaching others that the commandments no longer matter. That warning did not come with an expiry date.
And when a man came sincerely asking about eternal life Jesus did not say the law is finished and behind us. He said:
If thou wouldest enter into life keep the commandments. (Matthew 19:17)
Jesus then went deeper into the commandments in the Sermon on the Mount — not to abolish them but to reveal their true and fuller meaning. Do not just avoid murder — deal with anger in your heart. Do not just avoid adultery — deal with lust in your heart. That is not abolishing the law. That is Christ taking it deeper into the soul than any external rule ever reached.
And He closed the question of love and obedience with perfect simplicity:
If ye love me keep my commandments. (John 14:15)
Nobody here is saying the commandments save us. Salvation belongs to Christ alone — His life, His death, His resurrection. That is not the debate. The question is how a believer who truly loves Christ lives — and Jesus answered that question Himself clearly and repeatedly.
The commandments are not a yoke of condemnation for the believer. They are the natural expression of a heart that loves God. Jesus said so Himself.
The commandments are not the ten commandments.
Gentiles are under grace and not under the law.
1 John 3:23-24
This is His commandment, that we believe in the name of His Son Jesus Christ, and love one another,
just as He commanded us. The one who keeps His commandments abides in Him, and He in him.
We know by this that He abides in us, by the Spirit whom He has given us.
You are under the curse of the law.