Shalom Hodad.
I guess we need to start with Peter talking about Paul...
The only time we have Peter talking about Paul was in the Nazarene Council in Jerusalem when Paul arrived for his second visit, to solve a contension he had with some "Judaiazers," a term he used to call the Nazarenes. And what Peter said was that he, Peter, had been the one chosen by God to be an Apostle to the Gentiles and not Paul. See Acts 15:7.
2 Peter 3:16 He speaks about this subject in all his letters. Some things in them are hard to understand, which ignorant and unstable people distort to their own destruction, as they do the rest of the Scriptures.
Many seem to ignore this advise and try to make the Pharisee Rav Shaul (Paul) out to be simple to understand in all his writings, he's not.
Regarding those two Letters attributed to Peter, this never wrote them. They were written by unknown Hellenistic writers. Peter was an illiterate, unlearned and ignorant man. See Acts 4:13. Illiterate people can't write books.
Let's look at this verse in a little more context...Ephesians 2:11 Therefore remember that once you, the Gentiles in the flesh, who are called "uncircumcision" by that which is called "circumcision," (in the flesh, made by hands); Ephesians 2:12 that you were at that time separate from Messiah, alienated from the commonwealth of Israel, and strangers from the covenants of the promise, having no hope and without God in the world. Ephesians 2:13 But now in Messiah Yeshua you who once were far off are made near in the blood of Messiah. Ephesians 2:14 For he is our peace, who made both one, and broke down the middle wall of partition, Ephesians 2:15 having abolished in the flesh the hostility, the law of commandments contained in ordinances, that he might create in himself one new man of the two, making peace; Ephesians 2:16 and might reconcile them both in one body to God through the cross, having killed the hostility thereby. So what was the middle wall of partition that was broken down, the hostility that was killed on the cross?
This whole text above is only a Pauline explanation for his policy of Replacement Theology, which constitutes an insult to the Jewish religious dignity.
Keeping all of Eph 2 in mind, there are two things being addressed here. The first being the man made ordinances that separated Jews and Gentiles when it came to worshiping YHWH.
Such ordinances did not exist. Jews were proselytizers par excellence. So much so that all churches Paul took over throughout Asia Minor and North Africa were synagogues formed by the proselytes of the Nazarenes, who would become staunt defenders of the Law. Read Acts 21:20.
From the giving of the Law until the destruction of the first Temple, all one needed to do was join themselves to the God of Israel and obey the Torah.
Sorry, but that's not true, if you read Isaiah 56:1-8. There were a few requirements for Gentiles to join God's Covenant with the Jews.
Once we move into the second Temple era, there had been created a ritual Jewish conversion policy that Gentiles were now forced to follow. Because the belief was Jews and only Jews had a place in the world to come. THIS is one of the things torn down by Messiah on the cross.
If by Messiah, you mean Jesus, that's not true either, because Jesus made it very clear that he did not come to abolish anything in the Law and the Prophets but fulfill and to confim down to the letter, so that all Jews would practice, lest they would not partake of the kingdom of God. See Matthew 5:17-19. Especially verse 19.
The second was what Paul call 'under the law' which was his shorthand for 'under the condemnation of the Law'.
He was wrong because God did not give us the Law to condemn us but to show the way to live in harmony with each other in society. Read Psalm 119.
Sin and the punishment required for sin is what separates us from God.
Yes, but Prophet Isaiah had from God the method to reconnect ourselves with God so that our sins, from scarlet red would become as white as snow. See Isaiah 1:18,19
Yeshua has that hostility, that separation, to death, with His death on the cross for those who join themselves to Him.
That did not happen because Jeremiah made it very clear that, according to the New Covenant established with the House of Israel and the House of Judah, every one is supposed to die for his own iniquity. (Jer. 31:30) Jesus was born already under this covenant. It means that he did not die for our iniquities but on political charges. No wonder Pilate nailed that plaque on the top of his cross, with the reason why he had been crucified. Because he had been proclaimed king of the Jews.
When one really studies Paul they should find that he not only was Torah observant himself, but taught that all believers need to be observant of the written Torah.
I really studied Paul and found out that he used to preach against Moses, which is the same as to preach against Torah. He used to preach against circumcision which constituted the everlasting token of the Abrahamic Covenant. (Gen. 17:13) And he used to preach against the Jewish customs. It is all in Acts 21:21.
By the way...verse 11 is the key to understand most of Paul's circumcision/un-circumcision writings. When talking to Jews - circumcision = ethnic identity, when talking to Gentiles - circumcision = Jewish conversion.
Jews have their method as requirements for ethnic identity and Jewish conversion. No different at all from the Christian method of baptism so that a Christian be identified as a Christian. And last but not least, Jesus never had anything to do with Christianity, which started with Paul about 30 years after Jesus had been gone. You can read it in Acts 11:26.
Ben