Israel is the agent and surrogate of the United States and as such is treated entirely differently from every other country in the region. How can anyone expect Iran to accept that it is right for Israel to have nuclear weapons while itself being disallowed?
An increasingly multipolar world requires an entirely different kind of U.S. foreign policy: far from being unilateralist, it necessitates a complex form of power-sharing on both a global and regional basis.
The Chinese state is constructed in an entirely different way from western states. Unlike European states, for over a millennium the Chinese state has not been obliged to compete for power with rivals such as the church, the aristocracy or merchants.