Israel is the Promise of God to Abraham to make out of Him a nation of people (a peculiar people) that show forth the benefit of serving God. The whole OT is about The God of Israel. Other nations mentioned only as they touch Israel.
Are we not all one?
Ephesians 2:14 "For he is our peace, Who hath made both one, and hath broken down the middle wall of partition between us;"
The partition in the old Temple separated the Israelites [Jews] from the Gentile. At Christ's death on the cross, the earth shook, and the vial in the Temple was split in two, as recorded in Matthew 27:51. All barriers came down that blocked any person from approaching God through His Son, Jesus Christ. That wall of separation, separated the outer court from the inner court, and a Gentile could not walk past that wall. God's approach was through the holy of Holies, in the inner court, and the forgiveness of sins was only possible through the blood sacrifices offered there.
When Jesus shed His blood, all the blood sacrifices ended. Jesus Christ was the only sacrifice necessary to cover all sin, both then and now. Jesus is now the Temple, and when we are in Christ we become part of that body of Christ, or Temple.
Ephesians 2:15 "Having abolished in His flesh the enmity, even the law of commandments contained in ordinances; for to make in Himself of twain one new man, so making peace;"
In other words; there is only one temple, one family, one way through Jesus Christ. If you think it means "the law doesn't matter anymore", your wrong. The key to the understanding of this verse is stated," contained in ordinances". There is a difference between "the law", and "ordinances within the law".
This verse is directed to the ordinances of "blood sacrifice", also called "the daily sacrifices"that are within the law. These blood sacrifices are not required anymore. ever, because Jesus Christ's blood sacrificed on the cross satisfied completely that part of the law, before our Heavenly Father. Jesus was, and is the perfect sacrifice. See Hebrews 10.
Ephesians 2:16 "And that He might reconcile both unto God in one body by the cross, having slain the enmity thereby:"
All that believe and follow Christ now have this access to their creator.
Ephesians 2:17 "And came and preached peace to you which were afar off, and to them that were nigh."
Jesus preached His message to all flesh, Israelite and Gentile alike. Paul's ministry was directed wholly to the Gentile nations, and the lost "House of Israel", not the Jews [Acts 9:15].
Ephesians 2:18 "For through Him we both have access by one Spirit unto the Father."
This "one Spirit" is the "Holy Spirit", through Jesus Christ.
Ephesians 2:19 "Now therefore ye are no more strangers and foreigners, but fellow citizens with the saints, and of the household of God;"
Because of Jesus Christ's shed blood, we are fellow citizens in Christ's kingdom, His body, with all the other saints.
Ephesians 2:20 "And are built upon the foundation of the
apostles and prophets, Jesus Christ Himself being the chief corner stone;"
The Apostles are those of the New Testament; while the Prophets were the teachers in the Old Testament. Jesus Christ is the foundation, and the "fit Temple" for all of God's children who seek after Him, in any age.
The "Chief corner stone" is the stone which all dimensions of the entire structure are measured to, and now in the Temple of God, Christ is that "chief corner stone". When we partition to the Father now, we must ask in the name of Jesus Christ, for there is none other.
Ephesians 2:21 "In whom all the building fitly framed together groweth unto an holy Temple in the Lord:"
In both the Old and New Testament Christ is named the center of the structure, the cap-stone of the Temple. The Temple of today is in two parts; one is false, and one is true. The "false temple" will be built shortly in Jerusalem, and it will be from that temple that Satan will rule as the Antichrist, over his world religious system. The way many Christians are taught today, when the Antichrist sits there they will actually believe and worship him as Jesus Christ. However, the Antichrist is a fake and a counterfeit.
When Jesus Christ came out of the tomb, He became our "True Temple", and His word is that Temple "fitly framed together". You need no other Temple than Jesus Christ, and in the Millennium age another Temple will be constructed from where Christ will rule and teach the world.