Personally, I think that one has to consider an author in the context of the times he or she lived in, not through the modern lens of political correctness. Of course, that's true of most people in history. Someone who was very enlightened for their particular time period in history doesn't stand up to the current standard. Lincoln was racist by modern standards, yet he was fairly enlightened by the standards of the day.
As far as what an author does in their personal life, I don't really focus on that. I can see the point if they are still alive and you don't want your money going to someone who _fill in the blank of whatever thing you consider despicable_ but once they are dead, what's the point? As long as it doesn't leak into their writing, it's moot.
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