I don't have to since the question is faulty and doesn't make sense. I can easily explain how a person can have the irrevocable gift of eternal life: they believed in Christ. And God's will is that those who believe will HAVE eternal life, per
John 6:40.
By the very fact that one has the irrevocable gift of eternal life shows, proves, demonstrates that the call to salvation WAS available to them.
If the call wasn't available to them, they COULDN'T even have eternal life.
How can Jews who have yet to believe the Gospel,
though they still are called, have eternal life?
You will need to explain just how a person who is called to salvation, can have eternal life?
The Gospel must be obeyed by both Jew and Gentile.
The Jew has the same obligation to obey the Gospel as everyone else.
Paul makes this clear in the previous chapter, which sets the context for Romans 11, which you plainly ignore.
Your "theology" places eternal life in those
who have yet to obey the call of the Gospel, by confessing the Lord Jesus.
Paul just mentioned this in the previous chapter, and is the context of
Romans 11.
9 that
if you confess with your mouth the Lord Jesus and believe in your heart that God has raised Him from the dead, you will be saved. 10 For with the heart one believes unto righteousness, and
with the mouth confession is made unto salvation. 11 For the Scripture says, “Whoever believes on Him will not be put to shame.”12 For there is no distinction between Jew and Greek, for the same Lord over all is rich to all who call upon Him. 13
For “whoever calls on the name of the Lord shall be saved.”
Israel Rejects the Gospel -
14 How then shall they call on Him in whom they have not believed? And how shall they believe in Him of whom they have not heard? And how shall they hear without a preacher? 15 And how shall they preach unless they are sent? As it is written:
“How beautiful are the feet of those who preach the gospel of peace,
Who bring glad tidings of good things!”
16
But they have not all obeyed the gospel. For Isaiah says, “Lord, who has believed our report?”17 So then faith
comes by hearing, and hearing by the word of God.
Romans 10:8-17
Those who are still called to salvation through the message of the Gospel, can not somehow have "eternal life" while they have yet to believe and obey the Gospel.
For the gifts and the calling of God
are irrevocable. Romans 11:29
God, who “will render to each one according to his deeds”:7
eternal life to those who by patient continuance in doing good seek for glory, honor, and immortality; 8 but to those who are self-seeking and
do not obey the truth, but obey unrighteousness—indignation and wrath, 9 tribulation and anguish, on every soul of man who does evil, of
the Jew first and also of the Greek; 10 but glory, honor, and peace to everyone who works what is good, to the Jew first and also to the Greek. 11
For there is no partiality with God.
Romans 2:6-11
JLB