Its very hard not to let your personal prejudices come out of your writing, but you really do have to try.
The gratuitous inserts are what I’m talking about. Some go out of their way to inject it when it is totally unnecessary to the story line. That they do on purpose. The characters will be interacting and suddenly there is a few lines of dialogue on race or homosexuality which actually distracts from the story. It simply doesn’t belong. It’s so blatant.