Oh my God, a letter!!! That has to mean appeasement... Oh the horror!!! All you right wing wackos out there should know that yall are going to be on a prayer rug soon praying to Mecca, right?
Iranians are natural negotiators. They immediately accepted the implicit concessions offered by Obama and demanded more. They will be happy to negotiate the terms of our surrender until they build some nukes, then they will start offering us ultimata. The deal to be offered--return to normal status--is of little interest to the thugs ruling Iran. It would weaken them. They will seriously negotiate only if their hold on power is threatened.
Anyone with a brain in his head and a regard for human life will begin, and hopefully end, with diplomacy.