Christians have citizenship in the heavenly Jerusalem, Galatians 4:26, but Salem was a city of God in the holy Land, at the time of Melchizedek.
Genesis 14:18 And Melchizedek king of Salem brought forth bread and wine: and he was the priest of the most high God.
The ascended and glorified Lord Jesus Christ is our eternal and universal King and priest of the order of Melchizedek. Hebrews 5:10; 6:20; 7:11; 7:17; 7:21
Abraham was called a Hebrew, Genesis 14:15, before Israel came into being through his grandson Jacob, so was not yet separated from the Gentiles. The Melchizedek type of priest is not of the earthly Jewish Levite type of priest to a particular nation (Israel) but is the spiritual, heavenly king and priest of the most high God to all the world.
In this age, all peoples have been shut into the prison of their disobedience….Romans 11:32, and the world is once again a world of just Gentiles. Their being a part of this present world, makes the Jews effectively Gentiles in God’s sight. Ethnic Israel is fallen, diminished and cast away. Romans 11:11-15 This has worked to everybody’s advantage by making a level playing field for those who seek God and become Christian. For those Jews who do accept the salvation offered by Jesus:
Now if the fall of them be the riches of the world, and the diminishing of them the riches of the Gentiles; how much more their fullness? Romans 11:12
So there is no need to bless the State of Israel in order to receive a blessing from God in this present age. Note Jeremiah 14:10-12 In fact, because we are no longer strangers from the covenants of promise , Ephesians 2:12-13, and are the children of Abraham by faith, Galatians 3:7-9, it seems much more likely that those who bless members of the church of God will receive a blessing from God. The manifest wealth, power and (relative) humanity of Great Britain and the United States during their respective ‘golden eras’ is testimony that they were blessed of God for as long as they remained the hospitable home of true Christianity. Their decline is matched to the moving away from their Christian values.
Now as we approach the end time events, we can expect this to happen:
Jeremiah 12:14-17 These are the Words of the Lord about all those evil neighbours who have encroached onto the land which I allotted to My people: Israel, as their holding: I shall uproot them. Also, I shall uproot Judah from among them, but after I have uprooted them, I shall have pity on them and bring them back to the Land. IF they will learn the ways of My people, THEN Judah can establish families among My people. But any nation that will not listen, I will destroy.
This clearly stated prophecy, supported by the many other vividly described prophesies about the Lord’s Day of wrath, says how the Lord will virtually depopulate the entire holy Land area, including Judah. Ezekiel 21:1-8, Amos 2:4-5
My people: all true Christian believers will re-populate the Land and only Christian Jews will be able to join them. Jeremiah 50:4-5