Another way to look at it:I don't support Rowling or Card, do what you want, like what you want.
But this is a public forum. And I didn't realize being considerate of others was such a heavy burden, why even asking for it, I might lose your sympathy and that would be the worst thing in the world. Surely such a great and stalwart ally, lost forever to the burden of ... not bringing up fiction created by someone who is participating in stochastic terrorism aimed at trans people. Truly I know the great forbearance and suffering you must toil under. Oh woe and lamentation, surely a most vile and criminal form of censorship is the treatment of others with respect!!! But I understand that the abominable act of asking anything of an ally is the surest way to lose their allegiance. Truly, such a Catch-22, as the comfort and safety of one's allies might be risked by actually asking them to do anything to prove they are allies! Oh, how all friendships are under the fairest of weather.
If you dictate to your friends what media they should consume, and break friendships if they read, listen, watch or play something you don't like... are you really a friend?
I believe a Potter fan that wants to run a Hogwarts campaign, should be able to do so. And I believe they should be able to discuss that campaign on this forum, without us presuming they are horrible bigots who support Rowlings heinous point of view.