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_...
More than anything, Islam seems ill equipped to handle these matters. And to be fair, he indicated he is not the guy to come to for this topic.
I would bolster that to say that if someone truly wanted a substantive, educated opinion about fatwa, they would have gone to someone capable of giving them that.