'... "Trump is a monster, a madman and a vile racist. He's just like Hitler. Or Jimmy Carter.
During the Iranian hostage crisis, Carter issued a number of orders to put pressure on Iran. Among these, Iranians were banned from entering the United States unless they oppose the Shiite Islamist regime or had a medical emergency."
He cites two specific actions. One was an order for Iranian students to report to immigration offices in order to determine if they had violated the terms of their visa; if they had, they would be deported. The second was an order to end all future visas for Iranians and to stop issuing most new visas. '
Interesting historical context, of the sort that the BBC will definitely not ever relay.