item 2 is also debatable
The fact that Iran is enriching uranium to 20% has a simple explanation.
The US gave them a research reactor requiring, I think, 97% enriched uranium. The overthrow of the Shah means fuel was no longer forthcoming, so they have managed, at great expense, to modify said reactor to reduce its requirements to a mere 20% enriched.
Now they make fuel to that specification, and can continue to make isotypes required for treating cancer, etc, and prove the revised design as a basis for future reactor design.
But, regarding their energy programme in general, I think you'll ultimately find that this whole issue is about who's in the supply chain.
Now, oil leaves Iran, is refined elsewhere, and bought back - letting refining nations take a cut of all Iranian oil production, and effectively taxing the consumption of their own resource.
If Iran manages to complete its nuclear energy programme without needing to export raw uranium (of which Iran has a large portion of world supply) to the West for enrichment, it will be an achievement that relegates most of the world to being a mere end customer.
We know nuclear fission is an essential stepping stone on the path to an economy that can rely on future commercial nuclear fusion processes, so insinuating weapons programmes to justify intervention that will maintain Western hegemony over world energy supply is an essential foreign policy objective.
In case you haven't noticed, these Muslim nations are poor enough at their Islamic duty of 'zakat' (charity) amongst themselves, never mind infidels with a begging bowl for energy.