The Church today is Zero percent Israel by the will of God. There is no nation of Israel today, in God's eyes. Any Jew that wants to get saved must essentially became a Gentile and believe that Christ died for their sins, was buried, and resurrected after 3 days. Today, we have pure equality with the Jews, according to Eph and Col. We are now fellowheirs (equal heirs). During Acts and the Gospels, we weren't heirs at all, since we had no adoption - Rom 9:4.
The Gentiles are the chosen people today - Eph 1:4. Israel is not a nation or, even, a people, today, in God's eyes. The book of Hosea pretty much covers Israel situation today. As in Hos 1:9, Israel is now Lo-ammi, "not My people". In a few years (my guess is either 2063, 2070, or 2085), the Gentile period will end, the present Gentile church will be resurrected in the "Appearing" directly to Heavenly Places, Israel will once again be ammi, God's people, and prophecy will once again be fulfilled.
If we are now part of Israel, equality would be impossible, since Israel would still be the Head and the Gentiles would be the tail, as it was for 2000 years, until the end of Acts. The Mystery in Eph and Col is that, for the first time in History,the Gentiles are 100% separate from Israel, in that we have our very own blessings. The absolute proof of this is our #1 blessing, our Calling of being resurrected directly into the uncreated Heavenly Places, where God makes His abode and Christ now sits at the right hand of God - Eph 1:20, 2:6. Nowhere in the the Bible will you find any Jew, except Christ, that ever had or will have a Hope of ever going to the uncreated Heavenly Places - not even to visit. When things are different, they can't be the same. Israel (just those in the New Jerusalem, in the created Heavens - not those restricted to the New Earth) will be the Bride and the new church, found only in Paul's 7 post-Acts books, will be the groom, since, in this New Church, we Gentiles are Christ's actual body - Eph 5:30 -For we are members of his body, of his flesh, and of his bones. We, in this Church which is Christ's actual Body, Where Christ is the Head, will always be where Christ is, which may be in all of these realms, simultaneously.
Starting in Gen 12 and lasting for 2000 years (to the end of Acts, about 63AD), God was ONLY involved with Israel. During this time, God was finding those who will occupy the New Earth and the New (created) Heavens (the New Jerusalem). Since Israel failed to accept Christ, God set them aside at the very end of Acts, thus starting an all-Gentile 2000 year period, where God is finding those Gentiles who will occupy the uncreated Heaven, God's eternal abode. The Last shall be first, and the first shall be last. By God's Infinite Genius, He is filling both the created and uncreated Heaven(s) and also the New Earth.