@thisislieven @BenRiceM
I have some sympathy with people who have just not been paying attention and are on the fringe of Potter fandom. It's easy to miss how bad specific people and institutions are.
Somewhere I used to work did a gift drive before Christmas for the Salvation Army. I pointed out that, for a company with a stand at Pride that is actively trying to hire LGBTQAI+ folks, this is probably sending the wrong message. No one in the leadership team who approved it had any idea why this would be the case.
I don't blame the person who proposed them as a charity to support, who had seen only their publicity materials.
I do blame the people who approved supporting a charity without even looking at its 'controversies' section on Wikipedia.
I do blame the leadership team who, having been informed of this, continued to run the gift drive, rather than redirecting it to one of the (many) more inclusive options in the local area.
Similarly, if you've read the Potter books as a child and ignored them since then, I can understand your not knowing how much harm their author is doing and maybe being excited by the new series. But HBO management who approved it and anyone who acts in it cannot claim ignorance: they have actively decided that they want to participate in harming trans folks. And people who are reengaging with Potter fandom and are told about Rowling are making an explicit choice if they continue to do so.