Iran having nukes (and recall that in the broader middle east, Iran is largely considered a dangerous enemy) would result in the rest of the middle east pursuing their own nuclear weapons programs to counter Iran. Iran having nukes is a very bad idea - that's why the west , and even countries beyond, have been working for decades to keep Iran from getting nuclear weapons.

That would be fine too. The Soviets stealing our nuclear information was the biggest pro-peace act of the 20th century.