Americans know its consequences would be horrible. So do the incumbent and past Mossad chief. Israel can live with nuclear Iran. An Iranian attack to Israel is only a hypothetical case for theoreticians to fantasize about. Israel will be able to torture the Palestinians as much as they used to, Iran will not attack them for this, however there will be deeper shifts of cente of gravity in power sharing in the Middle East. At the end, it is impossible to produce a weapon (nukes in our case, by Israel) and expect the other side to sit back like a chicken and do nothing. This is against the nature of being human.
UN says deal reached on increasing flow of supplies to Yemen (AP)
from the article: Iran official: U.S. cannot stop us from cutting off world oil supply