That it was distasteful is a given, but the idea that at any point it reaches the standard of incitement to do any act, let alone murder, is simply bonkers.
Peter WalkerWith the full caveat that I'm not a lawyer, I'd be astonished if police took any action against Zack Polanski. Sure, it was distasteful and a mistake, but re-posting someone else's post in which this was one of 20 images*, and deleting it on being told of the content, is not incitement to murder.