In a situation like this, tone is everything. Whilst I understand the Twitter comments about "Talented but flawed gardener Fred West" etc etc, Fred West is only known as a murderer.
Holding the two thoughts at the same time is possible: he was a murderer, a serial abuser and a bully and, also, he changed the face of pop music, produced some imperishable classics and his sound is immigrated to this day. It's not excusing him to point out how influential he was in music per se. But using it to qualify his murder, his abuse, his horrific behaviour towards musicians - that's a pile of shite.