Is the sensitivity about foreign meddling so high across all the population that the best thing for Western leaders to do is just shut up and not give any opinion on this? What do these young people think about Obama and Sarkozy, for example?
As for sensitivity toward Western leaders: one of the major fears of the Iranian zeitgeist is foreign meddling. The Iranians were pawns of the Great Game, to the point that the Russians assimilated the northern province of Gilan as the Soviet Socialist Republic of Iran between the years of 1920 and 1921; and the British essentially seized the Abadan oil fields and formed the Anglo-Iranian Oil Company, later BP, later BP Amoco. When PM Mossadeq decided to nationalize those selfsame oil fields, the British complained to Truman, and Truman told the British to go fuck themselves. So the British waited until Eisenhower, made the same pitch, and that's how Operation Ajax (the CIA-backed overthrow of Mossadeq) took place. Ajax went so well it was the blueprint for the 1954 overthrow of the Guatamalan regime at the behest of United Fruit.
Likewise, it was a sign of Iranian weakness one of the conferences between Stalin, FDR and Churchill was in Tehran, with no Iranian permission for it. The Russians and British had so efficiently partitioned the country between themselves that they decided to just go for the gusto and do it. Go fgure.
So, the Iranians are very sensitive to
foreign meddling. This is in fact the argument that Ahmadenijad gave to scare people away from voting for Moussavi. But the young are very open to foreign
negotiation. Iran has a major inferiority complex because of its history;* most Iranians want to be treated as equals.
* extreme readers digest version: Iran was never a culturally homogenous place, incorporating at its peak under the Achaemenids various semitic, elamite, indo-european peoples, and a slew of languages and religions. Thus the style of government was always something akin to federalism; let locals practice their own quirky ways, as long as they pay taxes. Hence the Cyrus cylinder being at the UN. However, Iran has had a bad history of being invaded by people who insist on cultural homogeneity; Turks, Arabs, etc. Imposed homogeneity was a new and alien concept that the region never quite recovered from. Closest analogy is the Norman invasion of England.