But I suggest you remember when reading that Isaac and Ishmael analogy in Galatians that Ishmael did have a promise and an inheritance too.
Now it's Hersey to teach that Jews don't need to accept Jesus to be currently under the Covenant. Paul dealt with that in the first 8 chapters of Romans.
But Romans 11 does make clear after all the talk about them being enemies of The Gospel currently that the spiritual blindness on them will be lifted. Verses 25 and 26.
For I would not, brethren, that ye should be ignorant of this mystery, lest ye should be wise in your own conceits; that blindness in part is happened to Israel, until the fulness of the Gentiles be come in. And so all Israel shall be saved: as it is written, There shall come out of Sion the Deliverer, and shall turn away ungodliness from Jacob:Paul makes a distinction through Romans 9-11 between physical Israel and Spiritual Israel. But saying all Spiritual Israel will be Saved would be a pointless statement because you are already saved if you're spiritual Israel.
Hosea 5:15 says "I will go and return to my place, till they acknowledge their offence, and seek my face: in their affliction they will seek me early." Return implies he left it. This verse is a strong Old Testament witness to two Advents. But people who want to deny a future Salvation of Israel ignore it.
Stephen's sermon in Acts 7 wasn't finished. You can deduce how it was going to end by seeing his pattern was that Israel always got it wrong the first time but right the second time.
The other places where Jesus says something similar to this could be seen as referring to the Triumphal entry. But Matthew 23 is taking place after that. Verse 37.
"For I say unto you, Ye shall not see me henceforth, till ye shall say, Blessed is he that cometh in the name of the Lord."That and Hosea above are two witness for implying Israel accepting Jesus will trigger his return. Pre-Tirbbers and even usually Pre-Wrathers and fellow Mid-Tribbers tend to see that as the Revelation 19 return not when he comes in the Clouds. Well I think there is truth to that too, Israel's salvation will happen in phases over the course of the 70th Week. But.....
Keep Paul's fullness of the Gentiles connections for when Israel's blindness is lifted in mind as you read Luke 21. Now Luke 21 is about 70 AD until verse 24 where Jerusalem is trodden under foot of The Gentiles.
"And they shall fall by the edge of the sword, and shall be led away captive into all nations: and Jerusalem shall be trodden down of the Gentiles, until the times of the Gentiles be fulfilled.
And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, with perplexity; the sea and the waves roaring; Men's hearts failing them for fear, and for looking after those things which are coming on the earth: for the powers of heaven shall be shaken.
And then shall they see the Son of man coming in a cloud with power and great glory."The times of the Gentiles being fulfilled and the fullness of the Gentiles coming in are probably the same thing. Revelation 11 talks about the last three and a half years Jerusalem will be trodden under foot of The Gentiles. It's the same time period as the ministry of The Witnesses, clearly to me the first half of the 70th Week.
After The Witnessess are killed, and lay dead for three and a half days, then are risen and taken up to Heaven and an earthquake happens, the people of the City give glory to God. This is new in Revelation, earlier people didn't repent or praise God no matter what.
Then the next thing after they give glory to God is The Last Trumpet Sounds.
Now many people fear this doctrine that Israel will be Saved is setting the stage to trick Christians into accepting any Messiah accepted by Jews. NONE of the Dispensaitonlists I've followed are ignorant that the Abomination of Desolation happens before Israel's salvation. And they all know that Jesus return isn't something a Believer will miss if they aren't watching the News at that moment. We will be taken to where he is.