Lovecraft was pretty goddamn racist even for his time, and God knows it makes its way into his work.
If I remember correctly, Lewis Carrol made up Alice's Adventures in Wonderland to seduce his friend's pre-teen daughter.
Oliver Twist features an evil character usually called "The Jew" with bushy eyebrows, a long nose, who's greedy, and who--to literally the very end--values his money over his friends and even his faith.
Jaws (my favorite movie) featured a girl actually almost being drowned to death in real life in the opening sequence.
Stanley Kubrick often tortured his actresses in ways that makes me think of the doctor from Human Centipede screaming "FEED THEM!".
Ted Nugent is...well...Ted Nugent, and some people seem to like his music, whatever that is.
We all probably still listen to Michael Jackson, despite everything that happened with him.
George Lucas though Jar Jar Binks was a good idea, but try to pretend you won't ever rewatch the OT.
So on and so forth. There have been so many works whose authors (used in the sense of 'person who made it') were either tainted or monstrous in themselves, but I try not to let that stop me. I guess there's a sliding scale of degrees: I'm probably never gonna watch House of Cards or anything with Cosby again, but that doesn't mean I can't read Call of Cthulhu. Maybe it helps that Lovecraft is dead, so I don't have to think of my money going to him. Maybe it has to do with a creator's distance from their work, too; I have to see Cosby in Fat Albert, but I don't have to see Lovecraft in Call of Cthulhu.
I don't know, at the end of the day. I try to separate a work of art from their creator whenever I view it (or in the case of older works, put it in context of their time [such as Oliver Twist or Lord of the Rings]), but since I'm not a robot, that's never completely possible.
So my answer is to equivocate and bloviate, as always.