RSSIf the US attack Iran, the targets would be the underground missile cities. The only way for the US to destroy a significant proportion of them would be with nuclear Trident missiles but only if Russia does not help Iran intercept these missiles using its satellites, over the horizon radars and his own S-400 systems located at each missile cities. The question is: Will Russia help Iran to do so? It did not help Syria being attacked by only a few thousand Jihadis in spite of its commitment to do so. It did not intercept any Israeli planes attacking Syria in the years previous to this. It never seriously condemn Israel in spite of Israel helping Ukraine. There is a serious doubt wether or nor Putin could be compromised in favor of Israel. The Jewish oligarchs who supported his coming to power may have still some very compromising stuff on him. They may explain this biais towards Israel that Russia has.
If it is the case then this Jewish Lobby will prevent Russia to intercept this US missiles on the Iranian underground missile cities and thus get rid of the last power resisting the american empire to take full control of the middle east, including the trade corridors: Suez and the future railroad going throw Iran. If this happen then China oil from the middle east will be under US control as well as China trade roads throw the middle east. The US navy could then close the road around Africa and start a sea embargo on China and with a deal with Russia do a land embargo as well. Trump trade war with China is thus the preparation for the coming sea embargo.