The more interesting question is: what do we do with the art of people who were revealed to be terrible? I first saw people wrestle with this idea for Michael Jackson and recently it has been a big issue related to Kanye West.
https://en.wikipedia.org/wiki/Cat_Stevens%27_comments_about_...
There is no ambiguity here, Yusuf Islam called for Salman Rushdie's killing over a book that a Shia cleric claimed insulted the prophet. A book I might add that neither of them ever read. Later that year he again said Rushdie should be killed in a different context.