On January 6, 2006, the film Brokeback Mountain was pulled from Miller's Megaplex 17 theater at the last minute after Miller learned from a radio reporter that the film featured a gay romance. Other R-rated films, such as the comedy Grandma's Boy and the violent horror film Hostel were still allowed to be shown. As a result, the businessman was accused of exhibiting bias against homosexuality.
The cancellation brought international attention to the theater. The Gay Lesbian Bisexual Transgender Community Center of Utah and other gay rights groups urged its members to avoid patronizing Miller's various businesses. Jay Leno joked about the incident on The Tonight Show.
Miller later explained the cancellation, saying that he was concerned about "getting away from the traditional families", what he called "a very dangerous thing." Miller noted that several individuals purchased automobiles from his dealerships as a form of support for the decision. He also expressed regret for any feelings that were hurt as a result.[9]
John Amaechi, a retired center who finished his career with Miller's Utah Jazz in 2003, publicly announced his homosexuality on February 7, 2007. Miller issued a statement the following day, conceding that he had made a bad decision in pulling Brokeback Mountain. He described it as a "knee-jerk reaction" and said that he would probably allow the film to be shown if faced with the same decision again; however he said he was still unsure how he would react to an openly gay player on his basketball team