"It is finished"
When Jesus Christ cried out these words upon the cross and then gave up the ghost, the vale of the temple was rent from top to bottom, at that point, God gave up the people of Israel as His people, and the New Covenant was that all who would believe on Jesus Christ as Lord and Savior were His people, the new Israel.
That is why we read in Romans 9 that "not all who are of Israel are Israel."
There is no nation upon the face of the earth that is God's people, or God's nation.
It is they who love, believe, follow, serve, and live for Christ and look for His soon coming, which may be very soon now.
Even so, come Lord Jesus!
" In Thee O Lord do I put my trust " ~ Psalm 31:1~