Their admitting their Faith on Jesus Christ is kind of understood in my poll. We as Christians well know that ALL MUST believe on Jesus Christ to be saved. The question is 'when' for those orthodox Jews, because Paul in Romans 11 showed they are only being blinded by God during this world so The Gospel would go to the Gentiles. And one day that blindness is to be removed, which is when Paul quoted from Isaiah where God said He will remove their sins, i.e., pointing to their TIME when they will hear The Gospel with eyes to see, and ears to hear, and thus believe on Jesus Christ. That is set for Christ's future 1,000 years reign.
I don't have an answer about the timing but I have
speculated by looking at the Biblical type and comparing it with Zechariah 12-14:
* Joseph was hated by his brothers because he was beloved of his father and he had told them of the position of authority he dreamed he was to receive over them.
* At the instigation of Judah (Judas/Jews) Joseph was sold into slavery for 20 pieces of silver. Judas betrayed Jesus for 30 pieces of silver.
* Joseph's robe was dipped in blood to prove to his father that he was dead (except in this case it was not his own blood and it was a lie).
* Joseph was taken out of the dungeon by Pharaoh and highly exalted, receiving the highest position of authority with only Pharaoh himself excepted, and everyone in Egypt was to "bow the knee".
* Joseph took a Gentile bride.
When did Joseph reveal himself to his brothers who had come to him to buy grain?
When Judah showed remorse for what he had done:
Genesis 44:18-34.
Judah is beseeching Joseph (literally begging him for mercy).
Then...
"Then Joseph could not control himself before all those who stood by him. And he cried, Cause every man to go out from me! And no man stood before him while Joseph made himself known to his brothers.
2 And he wept aloud. And the Egyptians and the house of Pharaoh heard.
3 And Joseph said to his brothers, I am Joseph. Is my father still live?
And his brothers could not answer him, for they were dismayed at his presence." Genesis 45
"And I will pour on the house of David, and on the people of Jerusalem, the spirit of grace and of prayers.
And they shall look on Me whom they have pierced, and they shall mourn for Him, as one mourns for his only son, and shall be bitter over Him, as the bitterness over the first-born." Zechariah 12:10
Zechariah chapters 12-14 is one prophecy, and it's talking about the armies of all nations gathering against Jerusalem. So
if this is the time, then it looks to me like when Jesus appears in the clouds - that's when those Jews who had still remained His enemy will repent.
BUT if you're a Premillenialist then you will understand why I say tha
t if that's the case, it will be too late for them to be part of the resurrection of those who died in Christ at the time of His appearance - but they will be saved when they repent, and will be ruled over by:
"And Jesus said to them, Truly I say to you that you who have followed Me, in the regeneration, when the Son of man shall sit in the throne of His glory, you also shall sit on twelve thrones, judging the twelve tribes of Israel."
BUT I'M SPECULATING. Because I don't have an answer let alone "the answer" to the question of "when".