The story
Probably in reference to the fact that the Iranian-American population in Beverly Hills are more supportive of the Republican Party than Iranian-Americans elsewhere.
Etymology from Wiktionary, CC BY-SA 4.0.
Beverly Hills Iranian
Today it means: A member of the Iranian diaspora in the United States, particularly one living in affluent regions like Beverly Hills, who is perceived as being out of touch with contemporary issues in Iran and the broader Middle East; Often implying alignment with rhetoric or policies that are unsympathetic to the population of Iran and other Middle Eastern nations. Full definition →