I think I'd need a citation on why "prejudice and propaganda" applies here. The US doesn't turn to sanctions flippantly (it's not in the US's economic interests, in general, to take a trading partner off the table).
I probably wouldn't use language quite that strong, but the view from outside the US is definitely quite different.
The US withdrawl from the Iran nuclear agreement was more a result of changes in the US than of changes in Iran. Barack Obama brokered the deal and he stated his clear opposition to Donald Trump's decision to end it. (https://facebook.com/barackobama/posts/10155854913976749)
The European Union was also a party to the Iran nuclear deal, and they thought so poorly of the resumption of US sanctions on Iran that they passed a law making it illegal for European companies to comply. (https://dw.com/en/eu-to-reactivate-blocking-statute-against-...)
