In a completed science fiction novel I am trying to publish, there is a race of artificial beings called "Cartoon Characters". They look like the ones you'd see on Saturday Mornings but they have grown beyond that and are not fighting for the same rights we humans take for granted. I was told by someone I can't turn cartoon characters into a race and that it was like a "crack pairing". I reference slavery and oppression of minorities going so far as to mention the Jewish holocaust. This person says that would be tasteless but why. I didn't make light of it and it was just one of the characters reading about it.
The other criticism is why didn't I use humans or androids or genetically engineered humans. I don't want to I want the race I created.
What's the opinion of the court?