Hence the liberal church, no longer believes in the Word of God, believes itself to be a replacement for God's chosen people, allies itself with the Antichrists of this world (Muslims), and turns its hatred toward God's fulfillment of His Word(the nation of Israel).
Only God knows where Israel(the lost tribes)have been scattered throughout the world. Only He can unite them into one staff with Judah and Benjamin (who currently make up the modern nation of Israel).
The strange thing is that the nation of Judah(southern kingdom) now lives in what was once the land belonging to the lost tribes, and the West Bank is made up of Judah and Samaria, and considered by the liberal church as occupied land belonging to the Ismaelites.
There are those who believe the Church contains within it the lost tribes (Israel), and God is bringing them together with Judah to face in the end times the assault of the people of the Antichrist. Shiites believe they are Gog and Magog, and their Islamic theologians teach that Gog and Magog are the victors in the end time battle.
We as Christians are Zionist because we believe in a Jewish God, a Jewish Messiah (Yeshua) who will rule the world in peach from Zion. The liberal church tries to replace this with a poor substitution.
FWIW, the erroneous belief in supersessionism is as old as the state church model and is a belief held by the Protestant churches and the Roman church.