I feel like this is a post meant for a subreddit with a focus on sociology or something. Ethics?

I don't think being a fan of an invented world makes you anything in this world.

I understand that if you take into account JK's persona, and the coding of them or whatever, it seems like she was talking about Jews. But as far as the story is considered, the Goblins are just Goblins.

The story itself is art. It's expression, it's a journey, it's not the author. Even if it's a 'bad' story, someone can and will glean something of value from it. Something good. Even if it's a subversion of what the story is.

I hate censorship of art.