> Iran believes in martyrdom

Don't confuse religious rhetoric with actual state behavior.

In Iran’s case the highest religious authority has repeatedly issued a fatwa declaring the use of nuclear weapons forbidden.

Pakistan’s army motto invokes jihad, yet it has treated its arsenal as a shield against invasion so far, not a ticket to paradise.

Israel’s so-called Samson Option evokes a biblical suicide attack, but I doubt they'll use nukes for anything but deterrent.

North Korean propaganda urges citizens to die for the Leader, and I'm sure there are other nations I've not listed who's dominant religions have some sort of martyrdom idea, which use nukes as deterrents.

Look at political interests, command structures, and the costs of escalation, not whether a nation honors death in battle (which one doesn't?)