Iran always can develop dirty bombs and chemical weapons, but they dont want.
USA American Jewish bankers elite (real USA rulers) dont give a F if Iran blow up whole Israel or whole USA army in Middle East.
But they can't give blatant suicidal orders, they must escalate step by step, and invent a thousand lies in a false narrative to persuade USA army to suicide themselves.
They will be happy if nukes are used in Eurasia. The most destruction the better for them, more impoverishment and less energy and raw materials consumption.
They have all the money, they dont need money, they have all the USA slaves and factories needed for satisfy their needs, the only limiting thing for their richness currently is future supply of energy and raw materials resources and the solution is Iran war, destruction in Eurasia, in Middle East, in Ukraine, in Europe and so on.