It can be a hard choice with young children. I grew up watching Christmas Story every year. My son is two and I'm very hesitant to continue that tradition when he's a bit older. I don't want him to think that mocking people for their accents is something to be encouraged. It'd be nice to have a version of the movie where that scene is modified or redubbed because the movie is a creative treasure.

Of course, once he reaches an age where he's old enough to better understand explanations of racism in media, etc, that's a different story. All cultural history has attitudes that may have changed or that we may even view as repugnant. It's important that people learn about the past and what people were like in the past (or still today).

Maybe this type of thing would go off much better if parents were given a choice, and have the opportunity to confront these things with their children when they think they are ready.