There is a false doctrine which believes God has defaulted on His prophetic promises to Israel, and because Israel has rejected their Messiah, He now has forever given to the church, what He had promised to Israel. This is called replacement theology and is a false doctrine.
He is currently in the process of concluding the Church Age Dispensation and returning His focus to the Jews. He will fulfill His Promises to Israel.
The actual New Testament speaks of a merging theology. Out of Jewish and Gentile believers in Jesus the Messiah and Savior, one church is constructed.
Jesus can well operate in spite of misunderstandings of this kind, which do not constitute the unforgivable sin.
“He will fulfill His Promises to Israel.”
AMEN!