Be who ever you want
If your future prime minister has said that, it is very good.Here in the UK, we have nuclear weapons and we have a contender to be our next Prime Minister when we have another General Election and that person has vowed never to use them.
The leader of Iran would never make that claim. It would be just the opposite.
When you hold tremendous power, you need to be capable of great restraint.
But Iran can not actually say that directly when nations like the US are giving them threats. Personally i do not believe iran would use Nuclear weapons, because if they do they get wiped out