I don't believe in your replacement theology. The Gentiles ( Romans) came against apostate Israel in 70ad..completely destroyed Judaism. The remnant was those that believed in Christ. Christianity is the continuation of God's true religion not a temporary replacement.
Because of ministers of righteousness people continue to operated today in their thinking, nothings really changed. Their people are under the assumption that their sin debt is separation from God. If an ounce of new reconciliation in this Age of Grace could be restored for anyone when it comes to the issue of their sin debt then the degree of forgiveness that must be obtained in order to restore the reconciliation is the very degree to which that individual refuses to believe that Jesus accomplished it all. Paul’s good news message is hid from those people. They don’t understand what reconciliation is all about. They think that new sin (as Israel’s atonement work) needs a new measure of reconciliation. So they seek forgiveness on the installment plan. Is that not the golden thread woven through every denomination out there? It is. The issue at the Great White Throne Judgement will be those standing there in their own righteousness and not in God’s righteousness.