alt Hacker NewsThe land promised to the Israelites generally extends from the Nile River in Egypt to the Euphrates River in Iraq/Syria, encompassing modern-day Israel, Palestine, Lebanon, Jordan, and parts of Syria and Saudi Arabia.
If you're a religious Jew, then you believe you have a mandate from God (so an irrefutable right, or even obligation, needing no justification) to settle and rule not only the West Bank but the entire region. So there will always be that motivation, as long as religious Judaism exists in Israel.
That is not the ruling Likud ideology in Israel nor the allied national religious ideology; both refer to Israel+Palestine+Golan as "the Whole Land of Israel".
And in any case, the "most religious" (ie those whose politics are most totally driven by Judaism) bloc in Israel are at best ambivalent about the Israeli state and the settlement enterprise, and actively hostile to military service.
Israeli hostility to Iran is driven by a "defensive" paranoia, not a religious mission.