I can't speak for all Iranians, but I think that many of them would be uncomfortable with Ahmadinejad if Iran had nuclear weapons and he had his finger on the button. But the reality is that Iran's system of government is actually very complex. It has a lot of checks and balances, and neither Ahmadinejad nor any Iranian president would ever have his finger on the button. There are too many people involved in a decision of that magnitude.
