Though India had nuclear weapon since 1970's but it looked lost interest ( though it still worked on it later without attenton to avoid parts import embargo) in it after wards. I guess the reason is its 1970 war victory over Pakistan and creation of Bangladesh . It didn't find the need of display until late ninghties through pokran tests after victim of terrorism in Punjab in 80's and Kashmir sincce 90's. The man credited for testing n-bomb at pokran apj kalam called it ' strength respects strength' . I don't think any body will use it. More over as some body pointed out it spoils the harvest. If there is any body that gets overly paranoid about nuclear weapons, it is western countries who used to has/ still as good living standards, fear of losing it and this fear is fed by MIC through its cod war 1 propaganda. Others fear of nuclear weapons for sure but not to the point of western world. Probably they don't have too much to lose or too preoccupied with daily struggles. In the case of Iran, there is no incentive to showoff( if it has or still developing), news will feed Israel and hurts Iran due to business sanctions.