Even if it were granted that 100% of what you just said was true, that still wouldn't give any justification for interpreting Paul speaking about a dividing wall of hostility as referring to the curtain, especially when the Greek word used doesn't refer to God's laws.
Let’s examine the passage:
Eph 2:12 That at that time ye were without Christ, being aliens from the commonwealth of Israel, and strangers from the covenants of promise, having no hope, and without God in the world:
Eph 2:13 But now in Christ Jesus ye who sometimes were far off are made nigh by the blood of Christ.
Eph 2:14 For he is our peace, who hath made both one, and hath broken down the middle wall of partition between us;
Eph 2:15
Having abolished in his flesh the enmity, even the law of commandments contained in ordinances; for to make in himself of twain one new man, so making peace;
Eph 2:16 And that he might reconcile both unto God in one body by the cross, having slain the enmity thereby:
Here’s David Guzik commentary on that passage:
For He Himself is our peace: Jesus Himself is our peace; He hasn’t simply made peace between God and man and Jew and Gentile; He is our peace.
b. Who has made both one, and has broken down the middle wall of separation: The work of Jesus on the cross is the common ground of salvation for both Jew and Gentile. Therefore there is no longer any dividing wall between Jew and Gentile. Jesus broke that wall down.
i. In the temple, in between the court of the Gentiles and the court of the women, there was a physical barrier, an actual wall of separation between Jew and Gentile.
ii. Paul was, at the time of this writing, under house arrest in Rome, awaiting trial because he was falsely accused by the Jews of taking a Gentile into the temple past the literal wall of separation dividing Jew and Gentile. Paul makes it clear that in Jesus, the wall is gone.
iii. The wall of separation is gone because the common Lordship is greater than any previous division. If the Lordship of Jesus Christ is not greater than any difference you have with others - be it political, racial, economic, language, geography or whatever, then you have not fully understood what it means to be under the Lordship of Jesus.
c. Having abolished in His flesh the enmity, that is, the law of commandments contained in ordinances: The source of contention between Jew and Gentile was the fact that the Gentiles did not keep the law. But since Jesus fulfilled the law on our behalf, and since He bore the penalty for our failure to keep the law, we are reconciled through His work on the cross - putting to death the source of contention.
i. “The enmity of which the apostle speaks was reciprocal among the Jews and Gentiles. The former detested the Gentiles, and could hardly allow them the denomination of men; the latter had the Jews in the most sovereign contempt, because of the peculiarity of their religious rites and ceremonies, which were different from those of all the other nations of the earth.” (Clarke)
ii. “And the separation was intensified and emphasized by those institutions which were, in part, designed to isolate Israel from the world, until the fit time for the wider blessing. And He ‘annulled’ them by fulfilling them, in His sacrificial work; thus at once reconciling man to God and man to man.” (Moule)
iii. The law as a source of righteousness is no longer an issue. That source of enmity between Jew and Gentile is dead.
d. That He might reconcile them both to God in one body through the cross: Gentiles and Jews are brought together into one body, the Church, where our unity in Jesus is far greater than our previous differences.
i. So as to create in Himself one new man from the two: Early Christians called themselves a “third race” or a “new race.” Early Christians recognized that they were not Jews, not Gentiles, but one new man embracing all who are in Jesus.
