Death of an author is such an interesting concept because the author's nature is intrinsic to their work
The only place where it is possible to separate them from their offspring is in fan work where their work is transformed, reimagined and, in some cases, so altered as to be unrecognisable as part of the original work, but even then we are working from concepts and characters the author created
As a tool for enjoying the original work whilst ignoring an author's belief it fundamentally fails, because the original work is steeped in the worldview of its creator, you can tell that C.S. Lewis was deeply Christian from Narnia, that Stephanie Meyer is Mormon from twilight and how deeply Tolkien was affected by war from all his work but especially The Lord of the Rings
The worldview and values of authors bleeds through their work even when it is not overt
Fiction can only be created by one person at that point in their life because it is so shaped by who they were when they made it
To try and ignore who they are so you can enjoy their work without remorse is folly
And this is before you add money into the mix
Yes, I believe that fanfic is the most divorceable from a work's original creator but it is still showing an interest for the creator, you are still proving that there is a market to be sold to and by extension supporting them momentarily and giving them the platform to espouse their beliefs
This is obviously different for dead authors, who cannot financially gain from your enjoyment of their work, but you still have to be careful to think critically about what your imbibing
If you know an author is/was bad, how can you not think critically about the beliefs espoused in the works they created
