They also burned a piece of paper representing the nuclear deal (despite Iranian President Hassan Rouhani declaring during his rebuttal to Trump that Iran would seek further cooperation with its European partners and China, but barring that would begin enriching uranium "in the next weeks") and stomped on the paper's ashes. The “Death to America” chant has been used in Iran for many years, dating back to the 1979 Islamic Revolution. Iran’s Supreme Leader, Ayatollah Ali Khamenei, criticized Trump’s decision to withdrawal from the nuclear agreement, calling the U.S President’s comments “silly and superficial.”

Khamenei took it one step further by taking to Twitter to express his thoughts on the U.S. President:

France, Germany and the U.K. along with a majority of U.S. officials oppose President Trump’s decision to withdraw from the Iran nuclear deal while Israel supports the decision noting they’ve been against the deal.
After the United States withdrew from the Joint Comprehensive Plan of Action, a group of conservative Iranian lawmakers burned American flags and chanted Death to America.