The Church is not Israel, neither it has replaced Israel. I don't know how Christians can read Romans 11 and came to the conclusion that the Church has replaced Israel
Romans 11 13 Now I am speaking to you Gentiles. Inasmuch then as I am an apostle to the Gentiles, I magnify my ministry 14 in order somehow to make my fellow Jews jealous, and thus save some of them. 15 For if their rejection means the reconciliation of the world, what will their acceptance mean but life from the dead?
25 Lest you be wise in your own sight, I do not want you to be unaware of this mystery, brothers:[d] a partial hardening has come upon Israel, until the fullness of the Gentiles has come in. 26 And in this way all Israel will be saved, as it is written,
“The Deliverer will come from Zion,
he will banish ungodliness from Jacob”;
27 “and this will be my covenant with them
when I take away their sins.”
28 As regards the gospel, they are enemies for your sake. But as regards election, they are beloved for the sake of their forefathers
Isaiah 66 8 Who has heard such a thing? Who has seen such things? Shall a land be born in one day? Shall a nation be brought forth in one moment? For as soon as Zion was in labor she brought forth her children.
God asked, can a nation be created in 1 day? Then He answered yes by establishing Israel in 1948.
This was prophesied by Ezekiel also. Ezekiel 36:19 I scattered them among the nations, and they were dispersed through the countries. In accordance with their ways and their deeds I judged them. - this happened in 70AD. Israel was scattered across the world, with no land, no army, no government. But let's take a look what God says in verse 24 'I will take you from the nations and gather you from all the countries and bring you into your own land.' And this indeed happened in may 1948.
We can then surely say that the modern Israel is the same Israel in OT.
The people of Israel are cut apart because God chose them to be His Holy, Exodus 19:6 and you shall be to me a kingdom of priests and a holy nation.’ These are the words that you shall speak to the people of Israel.”
They are special for the sole reason that God has declared them to be special. They are the physical fulfilment of the extraordinary promese God made thousands of years ago to Abraham and his wife Sara.
It is for this reason Paul says in Romans 11: I ask, then, has God rejected his people? By no means! For I myself am an Israelite, a descendant of Abraham, a member of the tribe of Benjamin. 2 God has not rejected his people whom he foreknew.