Don't believe for a second that Sora will allow you to make racist content with Disney characters.
That said, there are a lot of other models out there that care about neither licensing nor alignment. So those will allow you to make racist content. Then you can do whatever you like with that generated content.
A lot of IP owners will learn that there is more than one way to skin a cat. It's easier than people think to turn children's characters, like say, Hermoine, into a raging racist. And there's very little technically speaking that they can do to stop it.
But yes, on OpenAI specific properties, they can definitely stop it dead in its tracks. They can even get better at stopping it over time. In fact, the more users try to generate it, the better the system will get at stopping it.
It's not racist, it's an historically accurate depiction of 1930s Germany under the authority of a significant leader who may or may not be controversial today