Goofy? I think that that joke will go over big next convention that the OPC has in a local phone booth - if there are any left. The Jews are God's chosen people. The Gentiles who believe are grafted in. I'm sorry if the Calvinist mind sifter has done its job a little too well.
Rome has not strayed so far from sanity that it now ceases to teach the truth that Paul was Trinitarian and that all believing Jews and Gentiles are now God's chosen people.
From the RCC catechism...
751 - The word "Church" (Latin ecclesia, from the Greek ek-ka-lein, to "call out of") means a convocation or an assembly. It designates the assemblies of the people, usually for a religious purpose.139 Ekklesia is used frequently in the Greek Old Testament for the assembly of the Chosen People before God, above all for their assembly on Mount Sinai where Israel received the Law and was established by God as his holy people.140 By calling itself "Church," the first community of Christian believers recognized itself as heir to that assembly. In the Church, God is "calling together" his people from all the ends of the earth. The equivalent Greek term Kyriake, from which the English word Church and the German Kirche are derived, means "what belongs to the Lord."
No red-herring of "replacementarianism." Just the people of God maturing into the full and revealed faith of Jesus Christ.