> they believe they have a religious duty to destroy the state of Israel.
Do they? What is this based on? My understanding was that they were reacting to a pattern of imperialism of which Israel was the crown jewel. Is there actually something inherent about the Shi'ite religion which says Israel must fall?
Iran was one of the first countries in the Middle East to recognize Israel. But it all changed since Islamic Revolution. Their official position since than have been that Israel cannot exist. They don't even refer to it as Israel but as "Zionist Regime". It's their official public position and what they say on their (government controlled) TV. They've been fighting proxy war with Israel since 80s.
I'm not sure that answers my question. They could have a political belief that Israel must fall but you haven't shown a reason to believe it's based on their religious beliefs. Obviously the two things are tied up together but I don't believe that if a Jewish homeland state had been created in Western Europe or in Antarctica that Iran would have an issue with it. Their problem is surely that Israel represents an historical and continuing power play by Western forces, a springboard from which the US and it's allies can encourage coups, wage wars and dominate the trade of the natural resources in the region. It seems like a very practical concern more than a religious one.
It doesn't matter for Israel weather it's based on religious belief or not. But Iran does frame their opposition in Islamic context in its communication to Iranian people. E.g. Khamenei says things like "fighting Israel to liberate Palestine is an obligation and an Islamic jihad."
https://www.rferl.org/a/iran-supreme-leader-israel-cancerous...