Iran's nuclear ambitions seem to have triggered a regional nuclear arms race. The neighbors started their own nuclear programs within months of Iran's decision to start enriching uranium. In the 11 months following Iran's decision to develop nuclear energy in 2006, 13 countries across the Middle East drew up new plans, or revived discarded ones, for building nuclear power projects.
A lot of bad things can happen if Iran gets nuclear weapons. And not all of them directly involve Iran having a nutjob government. Have a nice day.