In Islam there is a line between let's say freedom and the line which is then transgressed into immorality and irresponsibility and I think as far as this writer is concerned, unfortunately, he has been irresponsible with his freedom of speech. Salman Rushdie or indeed any writer who abuses the prophet, or indeed any prophet, under Islamic law, the sentence for that is actually death. It's got to be seen as a deterrent, so that other people should not commit the same mistake again.

As quoted in "Yussuf Islam, Formerly Cat Stevens, Expresses Support For Rushdie Death Sentence" in The Christian Science Monitor (1989)