The Law

Here's a simple rebuttal for you, Galatians, all of it and Matthew 5. Yet since you don't understand or want to believe the New Testament about the new covenant, I'll give you Old Testament evidence of the new covenant.
Jeremiah 31:31
Indeed, a time is coming, says the Lord, when I will make a new covenant with the people of Israel and Judah.

We have the Holy Spirit now.
Ezekiel 36:26-29
26 I will also give you a new heart and put a new spirit within you; I will take the heart of stone out of your flesh and give you a heart of flesh.
27 And I will put My Spirit within you and cause you to walk in My statutes, and you shall keep My judgments and do them.
28 And you shall dwell in the land that I gave to your fathers. And you shall be My people, and I will be your God.
29 I will deliver you from all your defilements. I will call for the grain and multiply it, and bring no famine upon you.

Notice "no famine upon you", because no curse from the law (see Deut. 28:18 among others).

So what else then ? Let's let God speak of it personally.
John 14:15 If you love Me, keep MY commandments. See Matthew 5 and ALL the Gospels for the difference between Jesus' commandments and the law.

Luke 22:20 Likewise He also took the cup after supper, saying, This cup is the NEW COVENANT in My blood, which is poured out for you.

cov·e·nant  (kŭv′ə-nənt)
n.
1. A binding agreement
2. Law
a. A condition in a contract such as a deed or lease, non-performance or violation of which gives rise to a cause of action for breach.
b. A contract.
3. In the Bible, a divine promise establishing or modifying God's relationship to humanity or to a particular group.

So if you're under the new covenant how are you not breaking the new law/contract/binding agreement by adhering to the old law? Yes you see, you Old Testament law keepers are the lawless ones by not keeping Jesus' (Gods') new contract/law.

Jesus fulfilled the law that we couldn't.
Matthew 5:17 "Do not think that I came to abolish the Law or the Prophets. I did not come to abolish, but to fulfill. 18 For assuredly I say to you, until heaven and earth pass away, one iota or one tittle shall by no means pass away from the law until all things are fulfilled.
Jesus fulfilled all things the law required.

John 19:30 ...It is Finished...

And I'm finished also, this OT law coffin is nailed shut. You can live "eye for an eye" and I'll live "turn the other cheek" as the new covenant dictates, because I'm a Christian.