The trouble is that publishing has always presented an impeccably woke veneer - it is an emblem of its role of representing society, analysing social structures and giving voice to the marginalised. There have always been certain head-prefect, teacher's pet types who have been at the forefront of that, vocally signalling their own flawless virtue, pointing the finger at those who are less pious. Joanne Harris is one of those.
Their mistake is that they assume that everyone else shares their view. They simply don't understand (in the way that fish don't understand they're wet) that the relative silence in the ranks is not because people agree, but because they are scared to state that they absolutely don't, precisely because there is only one acceptable viewpoint and those who don't share it will be punished, overtly or covertly.
And from that we can conclude that the organisation that represents authors and the publishing industry does not support free speech, and Joanne Harris is a very big part of the problem.