Ok the parts that support her at all are either monetary or public support. If you are interacting privately and not creating or promoting new work too much then you’re not doing much to support her at all. Especially if you’re speaking out against her. Just please don’t watch the new show or anything.
Most of her products for harry are contract based. She already got the money whether you buy it from store shelves or not. So like if you want to get a harry potter game from gamestop, shes not making money off that, same goes for like, if you wanted to buy the illustrated books from barnes and noble or something
As a trans person, Harry Potter has become a litmus test for me. People who have this attitude are simply people I can’t fully trust to have my best interest at heart. Rowling has said she considers any support for the series to be support of her values; at this point, people over 18 still publicly engaging either don’t pay attention enough to know or don’t care. Neither of those are people I can fully feel safe around.