We blame Jimmy Carter.
The six young Iranians who performed the dance in the above YouTube video were tracked down and arrested by the police in the Islamic Republic. Such is the legacy of anti-anti-Communism, as the Shah of Iran was deposed in a coup abetted by the KGB, and indulged by the President of the United States in the 1970s.
The Shah was a staunch ally of the U.S. and Israel, who was hated by Iran's religious leaders because he'd freed the people from their control. And reduced the Imams' incomes into the bargain. Under the Shah, women were free to wear western clothing and attend universities.