In scripture the church is spiritual Israel. In many passages a parallel is drawn between Israel and Jesus and his chruch. This is distinguished from physical Israel. Spiritual Israel involves a right relationship.
"And so was fulfilled what the Lord had said through the prophet: Out of Egypt I called my son." (Matthew 2:15). But the prophecy in Hosea 11:1 is not an individual son but the entire people of Israel." So, Jesus is equated with Israel.
The Church is the body of Christ; so, for this reason the Church is spiritual Israel.
In Psalm 80:8, God calls Israel a "vine" that He brought
"out of Egypt." Jesus later declares, "I am the true
vine" (John 15:1).
The apostle Paul also follows the principle in his letters of applying
statements originally made about the nation of Israel to Jesus Christ.
God called Israel "my firstborn" in Exodus 4:22. Yet Paul said
it was Jesus Christ who is "the firstborn of every creature"
The clearest example is when God calls Israel "the seed of
Abraham" (Isaiah 41:8). However, Paul later writes that
Abraham's seed does not refer to "many," but to "one,
... which is Christ" (Galatians 3:16). Thus we discover that
repeatedly in the New Testament, statements that once applied to the
nation of Israel are now applied to Jesus Christ. The Messiah is now
"the seed." Therefore, Jesus is the very essence of Israel!
There is more. Remember that the name "Israel" not only
referred to Jacob, but also to his descendants—who became Israel.
The same principle is seen in the New Testament.
For example, the Lord told the ancient Israelites, "And ye shall be
unto me a kingdom of priests, and an holy nation" (Exodus 19:6). In
the New Testament, Peter applies these exact words to the church:
"But ye are a chosen generation, a royal priesthood, an holy nation,
a peculiar people" (1 Peter 2:9).
Likewise, immediately after Paul's statement in Galatians 3 about
Jesus being "the seed," he then tells his Gentile (a non-Jew)
converts, "And if ye be Christ's, then are ye Abraham's
seed, and heirs according to the promise" (Galatians 3:29). Thus in
the New Testament, the name Israel not only applies to Jesus Christ, but
also to those who are born in Christ—His Church! In other words, all true Christians are now God's spiritual Israel.
The church is called the body of Christ (1 Corinthians 12:27), which is
one reason why James, when writing to the church, addresses it as the 12
tribes that are scattered abroad (James 1:1). From the very beginning,
the church has understood Israel to mean a spiritual body of Christ.
So, it's a reoccurring theme in the NT of Jesus and his body (the Church) being Israel in a spiritual sense.