Most Iranians I know are pretty cool. Iranians in general dislike the highly aggressive Israeli government (who would likely tone it down if they didn't have the United States on a leash as their big bad dog) as much as just about everyone else, at least as much as Pakistan which has nukes too.Second,can you really blame anyone for not wanting the most radical extremist country around known to give full support to terrorists to have access to nuclear weapons?
So no, I don't think anyone wants Iran to have nukes, but I also don't think anyone wants Israel to have nukes either. While they refuse to admit it, US intelligence is pretty much 100% positive they do, the only lack of consensus is what quantity.
So before we invade Iran because they MIGHT have even a single nuke with no effective way to deliver it or wage war on the United States, why not invade Israel where its not a question of "if" but "how many" nuclear, chemical, and biological weapons of mass destruction they posses. Send in inspectors like they did to Iraq, and if Israel stalls like Iraq did, then send in air strikes.