That doesn't make us Israel.
Dispensationalism teaches no such thing. And the Bible does not teach anything regarding Christ having a bride. There are merely illustrations relating relationships.
That is about Israel being rejected for their denial of Jesus as Messiah.
Being children of the promise doesn't make us Israel.
The Body of Christ is not Israel, but all who are in the Body are one and there is no Jew or Gentile in the Body.
And being a son of Abraham does not make us Israel. Abraham had many sons and only the seed of his grandson Jacob became Israel. The descendants of Isaac other than Jacob did not. And the descendants of Ishmael certainly did not.
Grafted into what? Christ? Certainly! Israel? No.
What translation reads "Israel" in Acts 7:38?
Because all instances of "Israel" I found in Acts 7 NKJV/ KJV/ NASB/ HCS are all "
Ἰσραήλ."