If iranian politics would have allowed nuclear weapons they'd have them already. They could also have accepted gifts from some of their more friendly international relations.

Which it is well known that it hasn't been the case since the revolution, where the republic inherited the nuclear program the US pushed the king to pursue. The shia leaders consider such weapons immoral, and hence it seems like the main aim for the aggressors is to remove obstacles in Iran and rush them into getting nukes. It also has the side effect of increasing proliferation in Europe, with several states now moving towards extending or developing nuclear weapons.

This rhetoric about them getting nukes is a deception, it's for people who know little to nothing about Iran that are constrained to a rather racist world view. The animosity towards Iran mainly has to do with them having tried to move away from a monarchical type of government towards a more democratic, unlike US and israeli allies in the region, who are mostly kingdoms and extremely autocratic.