Mistake to underestimate enemies. Ask the French how well the Maginot line worked. Iranians are an entirely different animal from Arabs, neither of whom are dummies, but the Iranians even less so. Psychotic, yes. Dumb, no. I would hope they blow themselves to kingdom come, but a doable battle plan must be devised in the likely event that they know exactly what they’re doing.
For starters, Iranians are Aryans. They are just a very islamafied Aryan nation.
The Iranians did fairly badly against the Iraqis in the 80’s.
They had them outnumbered 2:1, up to 3:1 at times, and still exhausted themselves and lost.
And that was when the Iranians were mostly still enthusiastic about their revolution and the mullahs.
You’re right about not dumb, even in a psychotic episode. Mullahs will never use nukes on Israel nor attack Israel (using conventional warfare), unless Israel does it first, leaving them no choice. The objective of mullahs is not self-destruction, it is self-preservation - they’re very clear on that.