I think the Roman church needs to re-read Paul's letter to the believers in Rome:
shalom b'shem Yah'shua ( YHvH be my salvation )
Very specifically: Romans 11 where Paul discusses who is grafted into whom.
YHvH's larger plan of salvation, where His People are blinded for a time,
in order to bring His salvation to the gentile nations. NAsbU Romans 11:15 For if their ( His Chosen People )
And their ultimate salvation after a period of blindness is guaranteed by YHvH's covenant :
rejection is the reconciliation of the world,
what will their acceptance be but life from the dead?
NAsbU Romans 11:25 For I do not want you, brethren,
to be uninformed of this mystery--
so that you will not be wise in your own estimation--
that a partial hardening has happened to Israel until
the fullness of the Gentiles has come in;
26 and so all Israel will be saved; just as it is written (in Isaiah 59),
"THE DELIVERER WILL COME FROM ZION,
HE WILL REMOVE UNGODLINESS FROM JACOB."
27 "THIS IS MY COVENANT WITH THEM, WHEN I TAKE AWAY THEIR SINS."
28 From the standpoint of the gospel they are enemies for your sake,
but from the standpoint of God's choice they are beloved for the sake of the fathers;
29 for the gifts and the calling of God are irrevocable.
I think we’re well aware of Romans 11. In fact, the prayer in question is clearly based on it, and prays for its speedy fulfillment.
"But we preach Christ crucified, unto the Jews indeed a stumblingblock, and unto the Gentiles foolishness: But unto them that are called, both Jews and Greeks, Christ the power of God, and the wisdom of God." 1 Corinthians 1:23-24