The Nation of Israel on the earth was a wife of God in the flesh (i.e. on the earth) which is a SHADOW and not the ACTUAL BRIDE. The Real Bride of Christ is Revealed in the New Testament as the Church which consists of the Elect from amongst both believing Jews together with believing Gentiles (which is part of the Mystery of Christ, which is ‘Christ in you, Hope of Glory!’) and they will INHERIT the Kingdom together as KINGS and PRIESTS (the Substance of Christ).
The Israel on the earth which was called the wife of God is in the ‘flesh’ and ‘blood’. Now, ‘flesh and blood’ cannot inherit the Kingdom of God and hence their ‘election’ in the flesh can at most play a Prophetic Role on the earth in their Priestly role as Levites in observing the 7 Jewish Feasts whilst being ‘mortals only’ as it is evidenced by the Millennial Reign.
Yes, they are ‘enemies of the Gospel’ (meaning that they are NOT elected as His spiritual sons automatically) but at the same time are ‘elected as beloved for the sake of the patriarchs’ (meaning that they are elected in the flesh since the patriarch relationship is that which is born according to the ‘flesh and blood’). The Fact that they are beloved points to that since His Love never Fails, He Will Save ALL Israel too bringing them to ENTER His Kingdom of the Heavens eventually.
In order to be adopted and inherit the kingdom as the Sons of the Resurrection, one has to be the Elect according to the Son of Promise (foreshadowed by Isaac) and understood to refer to those having faith, believing in the Faith of Jesus Christ on earth itself. These ones are born of the Will of God and begin being Born Again in the Water and His Spirit (signified by the Baptisms in Water and in the Holy Spirit, Fire respectively) on earth itself experiencing a ‘renewal of the New Man within in the spirit whilst the outer Old Man in the flesh is wearing away daily’. Yes, the ‘flesh’ (of the Natural Body) profits nothing in view of His Kingdom.
So, those who are Christ’s will be His Bride who are gathered with their soul with spirit upon bodily death at the New Jerusalem awaiting for a full number of them to come in. As such believers are One Spirit with the Lord being united with Him on earth itself. When this is achieved, the Election of Grace is Complete and His Bride will be Ready for the Marriage with the Lamb when He Returns on the Day of the Son of Man.
Upon the Consummation of this Marriage, the bride becomes His Wife and being One Flesh too now and thus becomes His Body Literally (as Prophesied in Scripture prior that His Church is His Body) in that their (soul with spirit) now obtains the awaited Redemption of the Body (being complete with ‘body, soul and spirit’) in the Newly Given Spiritual Body during the Great First Resurrection being Immortals in a Spiritual Body which is Imperishable (i.e. it cannot be tainted with sin and nor can sin have any effect on it) and they die no more, being the Sons of the Resurrection.