Let’s get back to the subject of the thread - Jews eternal fate.
God gave them promises of the Messiah and restoration of their nation. God gave them choices and it was for them to choose which one.
Dt 30:15-20 See, I set before you today life and prosperity, death and destruction. 16 For I command you today to love the LORD your God, to walk in his ways, and to keep his commands, decrees and laws; then you will live and increase, and the LORD your God will bless you in the land you are entering to possess.
17 But if your heart turns away and you are not obedient, and if you are drawn away to bow down to other gods and worship them, 18 I declare to you this day that you will certainly be destroyed. You will not live long in the land you are crossing the Jordan to enter and possess.
19 This day I call heaven and earth as witnesses against you that I have set before you life and death, blessings and curses. Now choose life, so that you and your children may live 20 and that you may love the LORD your God, listen to his voice, and hold fast to him. For the LORD is your life, and he will give you many years in the land he swore to give to your fathers, Abraham, Isaac and Jacob.
They did not take their chances and so Jerusalem should lay desolate and no stone would be left unturned. They were whom Jesus called pervert generation. And so they will not see the Lord again until they recognize God’s only Son, and bend their knees and confess with their tongues that he is Lord.
Mt23:37-39
"O Jerusalem, Jerusalem, you who kill the prophets and stone those sent to you, how often I have longed to gather your children together, as a hen gathers her chicks under her wings, but you were not willing. 38Look, your house is left to you desolate. 39For I tell you, you will not see me again until you say, ‘Blessed is he who comes in the name of the Lord.’ "
Of course the question now is: what about Jerusalem? The prophecy still stands, I suppose. The choice is theirs and the Lord can’t wait forever. Depend on their choice, whether Jerusalem would still be theirs or taken away from them and given to God’s people of the New Covenant.