The church is Israel. The two are not separate. During the Old Testament dispensation, Israel was the church. Israel according to the flesh rejected the Messiah and He also rejected them. Jesus said to the Jews, "Your house is left unto you desolate," Matthew 23:38. Now not all the professed believers are reckoned Israel, but only those that have the sign between them and God. And this is the sign,even the Sabbath of the fourth commandment. See Exodus 31:12-13, "The Lord spake unto Moses, saying, Speak thou also unto the children of Israel, saying, Verily My Sabbaths ye shall keep: for it is a sign between Me and you throughout your generations; that ye may know that I am the Lord that doth sanctify you" . Here the Sabbath is clearly defined as a sign between God and His people.
Replacement theology is just so wrong and off kilter:
The "original Covenant was not the Law it was the Promise to Abraham of a coming "SEED" that would wipe away our sins. Then you have Jeremiah saying to Israel that God would write the Laws on their
Hearts in the last days.
All Israel being Saved doesn't mean all people of Israel will be saved, it means Israel as a Nation turns back to God. There are now Messianic Jews, always have been some here an there, most who live in Israel and turn to Chris Jesus are castigated by their families, they are despised and hated. Jews do not hate Christians per se, they hate other Jews who become Christians. This is what Paul meant by "All Israel" will be saved. He is speaking about that day that the nation of Israel is turned back unto God. Just as Daniels 70th Week Decree prophesies will happen, just as Zechariah 12:10 prophesies will happen, just as Paul promises will happen, just as many prophets prophesied will happen.
No Law can justify any man/men anywhere. The very reason Israel was considered unjust is because they turned to false gods and didn't keep the Law, which no one can. Israel then refused to accept the Lamb of God, the express image of God, one Jesus Christ, their promised Salvation or coming "SEED". Yeshua (Jesus) means Salvation. So when Paul says all Israel will be saved he is in NO WAY saying that everyone in the "Church" is going to be saved. He is saying Israel as a nation is going to one day turn back unto God, just as Malachi 4:5-6 promises, and in the very passage in which he speaks about this.
Romans 11 starts off with Paul asking the question has Israel been lost, Paul says God forbid, God has kept 7000 men ( I think this represents the fullness of Israel repenting at some point, not 7000 men) who have not bowed the knee to Baal. He then says there is a Remnant according to grace, and that it can never be of works, if so it could not be Grace. Then Paul says God has given Israel the spirit of slumber even unto this Day.....Now 2000 years later even unto this day also. Paul then tells them why Israel was cast aside, it answers everything we need to understand the whereto/wherefore and all the WHYS !!
KEY BELOW.............That solves the question about replacement thology, and finds it wanting.
19 Thou wilt say then, The branches were broken off, that I might be grafted in. 20 Well; because of unbelief they were broken off, and thou standest by faith. Be not highminded, but fear:
23 And they
also, if they abide not still in unbelief, shall be grafted in: for God is able to graft them in again.
25 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. (Israel and the Gentiles are Two different entities by Paul's own Words)
26 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:
So what does this passage mean/imply ? That Israel (branches) was broken off because of their UNBELIEF and will be Grafted back in when they BELIEVE AGAIN !! BOOM. So when does Israel believe again ? When the Fullness of the Gentiles is come in,
PLAIN AS DAY !! And then what happens ? All Israel, or Israel as a Nation repents as a Nation and turns back unto God/Messiah, just as Zechariah 12:10 prophesies.
It is true, all of us are Gods children, in Christ Jesus,
BUT for anyone to say that Paul when he said that there is neither Jew nor Greek was referring to the nation of Israel as having no place in future prophecy and is only the "Church" is people ignoring Paul's very words right here in this very passage. He says WHEN THE FULLNESS OF THE GENTILES BE COME IN ! This shows there will be TWO ENTITIES !! All Israel will be Saved, when the Time of the Gentiles is come in.
So Israel is a separate entity from the Gentile nations. We as individuals are all the same, children of Faith/Belief on/in a God who justifies us BY FAITH, but Israel and the Gentile Nations have separate callings, Israel brought forth the Messiah, the Gentile Nations brought forth the Gospel of the Messiah to the World, the Church will be Raptured to Heaven when the Gentiles time has been Fulfilled, then all Israel will be Saved, as a NATION, not all Jews will be saved, that can only happen via Jesus Christs blood. But a large majority of Israel will turn to God, and Israel as a Nation turns back to God. Not ALL ISRAEL Turned from God, there were still Godly men and prophets like Daniel who kept Gods commandments and they were Holy men before God, but ALL ISRAEL turned from God, as a NATION..........And likewise all Israel will turn back unto God in like manner.
Thus ALL ISRAEL WILL BE SAVED.........When they believe in God again as a Nation
Israel is not the Church and the Church is not Israel, its is a MISCONCEPTION of Men.