Former pop singer Cat Stevens reiterated his support for the Ayatollah Ruhollah Khomeini's death sentence against Salman Rushdie, saying the author's treatment of Islam was "as good as stabbing Moslems in the heart." Stevens, who changed his name to Yusuf Islam when he became a Moslem in 1979, said Tuesday that threatening to kill Rushdie was the equivalent of the United States using an atomic bomb. "It's got to be seen as a deterrent so that other people should not commit the same mistake again," Stevens said in an interview with the television show "World Monitor," produced by The Christian Science Monitor. Rushdie's novel "The Satanic Verses" has generated outrage among Moslems.