That's the centrifuges. There's plenty of other targets that they rely upon for their program - Arak heavy water reactor for example.
Syria 2007(Operation Orchard) and Iraq 1981(Operation Opera) are the precendents.
Denying nuclear weapons to an apocalyptic theocracy is a worthy goal and in the entire world's interests. Including the interests of Iranians.
Well you see ALL of the those regimes want to prevent Iran getting nuclear weapons also. Another thing that you don't seem to understand is that the entire world is waging war against the US whether economic/political/cyber/trade. Those countries, and China and Russia and Venezuela will only use any 'negotiating' process to further their war effort.