Most Harry Potter fans are ignoring the controversy of Rowling, it doesn't affect their views of the series one way or another, and trying to guilt them into not supporting the series isn't going to happen, so don't try.
At this point there are three groups. Those who gave up on the franchise because of Rowling's personal behavior, those who agree with her and support her more because of it, and the average Harry Potter franchise fan who doesn't care and isn't paying attention. That last third is the largest group and I hold nothing against them.
"Intelligence has no place in Politics" Londo, (Babylon Five)
Best new show of 2023, One Piece live action.