There were tons of jews in Persia prior to the Ayatolla taking power. Large communities of Persian jews moved to Los Angeles, Vancouver BC, and many other places around the world.
The rise of the Ayatollah had nothing to do with Jimmy Carter. It, and the release of the hostages, was engineered by the Reagan administration with substantial help from many who would later become big players in both Bush regimes. The Iran-Contra Connection would make a good place for you to start reading, Cike. Guns for Oil, Arms for Hostages, washing drug money, using military planes to import cocaine into the American ghettos....this is the true legacy of the Reagan/Bush years. Jimmy Carter was the fall guy.