Foreigners where not flooding the boarders of Israel why? Because they had to live by the same laws as the Jews they didn’t allow for free or murder, false gods, adultery, fornication, gluttony, abortions, stealing, sexual uncleanness.
Israel had health laws they couldn’t be like the world, they must have their sins forgiven by temple sacrifices. In other words, they had to convert and even then there were position they could never hold like priest being part of the tribes of Israel.
Christ Jesus understood what boarder are he was a Jew he is the king New Jerusalem above; promoting invasion of boarders is a denial of God and faith in Christ!
21:3 I heard a loud voice out of heaven saying, “Behold, God’s dwelling is with people, and he will dwell with them, and they will be his people, and God himself will be with them as their God.
21:4 He will wipe away from them every tear from their eyes. Death will be no more; neither will there be mourning, nor crying, nor pain, any more. The first things have passed away.”21:5 He who sits on the throne said, “Behold, I am making all things new.” He said, “Write, for these words of God are faithful and true.”21:6 He said to me, “It is done! I am the Alpha and the Omega, the Beginning and the End. I will give freely to him who is thirsty from the spring of the water of life. 21:7 He who overcomes, I will give him these things. I will be his God, and he will be my son.
21:8 But for the cowardly, unbelieving, sinners, abominable, murderers, sexually immoral, sorcerers,{The word for “sorcerers” here also includes users of potions and drugs.} idolaters, and all liars, their part is in the lake that burns with fire and sulfur, which is the second death.”