Meanwhile, opponents of the accord to limit Iran’s nuclear activities for the next 15 years have likened it to the Munich Agreement (shameful appeasement of an evil foe), while its supporters have compared it to the rapprochement between the United States and China in the 1970s. But the Iranians are nothing like the Nazis, and there is no country like the Soviet Union posing the kind of threat that inspired US President Richard Nixon to head to Beijing in 1972.