Zionism is not an ideology, Zionism and Judaism are one and the same. Zionism is completely derived from the Bible of the Jews. Ben Gurion in fact said that the Bible was his mandate. Take a look below what he said in 1937 at the Peel Commission:
Ben Gurion: I say on behalf of the Jews that the Bible is our Mandate, the Bible which was written by us, in our own language, in Hebrew, in this very country. That is our Mandate. Our right is as old as the Jewish people. It was only the recognition of this right which was expressed in the Balfour Declaration and the Mandate. It is stated in the Mandate that it recognizes the right of the Jewish people to reconstitute their National Home.
Chairman: You think it is, in fact, stated more clearly in the Bible than in the Mandate?
Ben Gurion: I say it is more strong and it was recognized in the Mandate that our right was not created in 1917 or 1922. It was recognized that we had a historical connection with Palestine and there are also other grounds for reconstituting and re-establishing our National Home and not merely establishing a new thing, only re- establishing a thing which we had, which we held and which was our own during the whole history of the Jewish people.