His comments in 1989 concerning Salman Rushdie after the publication of Rushdie's novel The Satanic Verses provoked controversy. During this time period an Islamic fatwa (religious ruling) was issued, holding that it was an obligation of Muslims to kill Salman Rushdie. Yusuf Islam publicly stated that Rushdie was indeed guilty of blasphemy against Islam, and Rushdie deserved to be killed. This led to a public outcry, and a drop in record sales. In response to this criticism, Yusuf Islam has since clarified that he believes that a death sentence can only be carried out by the authority of a court in an Islamic society, and that he is opposed to anyone taking the law into their own hands by murdering Rushdie.