You need to reread Saint Paul. In Jesus Christ there is no longer any distinction between Jews and Gentiles. All are now called, Jew and Gentile alike, to salvation in the one covenant of Jesus Christ. This is true Biblical doctrine.
Jew and Gentiles of the Church age which began with the eleven apostles of Jesus and then Paul, all Jews, and then God began the body of Christ when He sent Peter to Cornelius house, a gentile who loved Israel and prayed to God, who Peter witnessed to. Then, while Peter yet spoke of the works of God and His Christ, the Holy Ghost fell on him and on his household and they began to speak with tongues and this astounded Peter and the six Jews with him that God brought in the Gentiles also. The church, the body of Christ, Jew and Gentile for some 2000 years now.
That is true regarding Salvation.
It is also true that God's covenant with Israel was never declared null and void by God. That is why it is a covenant.
Israel (and its rebirth in 1948) is precious to God, and Israel has a major, major, major role to play in both the End Times and the Millennial Kingdom that God creates after the Great Tribulation.
Anyone, or any institution, that opposes Israel, seeks to divide Israel, seeks to take land away from Israel, seeks to take sides against Israel - is an enemy of God.
The Scriptures make this very plain. In fact, it will become even more plain to the entire world when God Himself intervenes during the War of Ezekiel 38/39.
A true follower of Jesus Christ loves Israel, as God does. Replacement Theology is wrong. The Church is the Church, it is not Israel. God still has an agenda for Israel. A big one, including its Salvation.
As a position in Christ, yes. That is a different issue.
Paul also says...
Romans 11:28-32
As far as the gospel is concerned, they are enemies for your sake; but as far as election is concerned, they are loved on account of the patriarchs, for God’s gifts and his call are irrevocable. Just as you who were at one time disobedient to God have now received mercy as a result of their disobedience, so they too have now become disobedient in order that they too may now receive mercy as a result of God’s mercy to you. For God has bound everyone over to disobedience so that he may have mercy on them all.
That is 'in' Jesus Christ...Outside of Jesus there are still Jews/Israel...Israel has not been replaced by the Catholic religion...
All are now called, Jew and Gentile alike, to salvation in the one covenant of Jesus Christ. This is true Biblical doctrine.
However, Israeli's eyes have been blinded by God for a season (or three)...They have been put on hold while God deals with the Gentiles...Romans 9, 10, 11...