Respectively, what an author has or has not done, will have no impact on whether I will buy, read, and probably enjoy their book. It just means that I may choose to buy the book second hand, to avoid contributing to royalties.
Respectfully, that’s a completely reasonable take. If you know an author is using their money to platform heinous shit and you don’t want to contribute to it, it is truly the Least you can do the but second-hand so they don’t profit from it.