Zion: The Mountain of God
Zionism is not in the bible, but Zion is. Zion is the holy mountain of God. It is Jerusalem, but specifically, spiritual Jerusalem. Zion is not just for the Jews. That is an Old Covenant mindset. Through Jesus Christ, Zion is for the whole world. Even though we should hold tight to a New Covenant mindset, we can still visit the Old Testament for this truth because the Old Testament does not automatically mean the Old Covenant. For instance, check out Psalm 87:4-5
4 I will make mention of Rahab and Babylon to them that know me: behold Philistia, and Tyre, with Ethiopia; this man was born there.
5 And of Zion it shall be said, This and that man was born in her: and the highest himself shall establish her.