I don't disagree with this, it's just that there's no reason to assume Israel simply wants the least hostile Iranian government. We never saw a real effort to replace the Islamic Republic, not even now. Likewise there was never an attempt to replace Hamas in the Palestinian territories.
Well also, about Pahlavi being deposed by his own people, who really knows.
What do you think Israel’s objective is then? It seems rather clear to me that they have expansionist ambitions which necessitate defeating their neighboring foes, who are backed by Iran. A non-hostile Iran is an Iran that does not back these foes. There has been no attempt to replace Hamas because Israel’s goal is the ethnic cleansing of Gaza.