I found this blog post recently, and I thought it had some interesting things to say about problematic things and how you can still be a fan of them even though they might offend some (or most) people:
What are your “problematic things”?
I wouldn’t exactly call myself a “fan” of H.P. Lovecraft’s work, but I recognize that he did contribute a lot to horror as a genre, even though he was a racist (how many times can you say ‘mongrel’ in one story?) sexist anti-Semite. I enjoyed the first three books of Anne McCaffrey’s “Dragonriders of Pern” even though characters get away with rape and actions that would be seen as physically abusive in this day and age, not to mention McCaffrey’s odd views on the causes of homosexuality (see ‘the tent peg theory’).