Christian Zionism is an idea that has existed for only a few centuries. That is, it is extra-biblical, rooted in the erroneous notion that Christ did not come when he said he would come.
Judaism and Christianity are two distinct religions, the latter being a departure from the former. Else, why would it have emerged?
A Judeo-Christian idea is also not that old, though I can see why it developed. Before Christ, despite the debauchery and idolatry of the Jews, their prophets did impart some wisdom. Christianity imparts love and charity. And truth.