I think old Yusef Islam called for the death of Salmaan Rushdie, as I recall...not really cool on the Peace Train.
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In December 1977, Stevens converted to Islam, and he adopted the name Yusuf Islam the following year. In 1979, he auctioned all of his guitars for charity and left his musical career in order to devote himself to educational and philanthropic causes in the Muslim community. He was embroiled in a long-running controversy regarding comments which he made in 1989 about the death fatwa on author Salman Rushdie.
https://en.wikipedia.org/wiki/Cat_Stevens
Islam transformed a talented writer of uplifting songs into a messenger of death.