The relationship between Russia/China and Iran si the same as the parasitic relation Israel-USA. the problem is that israel has already the WMD, whereas in iran so far the aim has clearly been only electricity generation. Why would Israel have to be the exclusive owner of nukes. It is not any less a rogue state than Iran.
Trump: Middle East would be more stable if Saddam, Gaddafi still in power (Reuters)
from the article: U.S., EU slam Iran nuclear enrichment activity at Security Council meet