All she got was it was a racist comment and to write her up to where she would be fired for anything!

This sounds like maybe a good thing? That there is some documentation about it at least and a start date to roughly go by.

I'd imagine they would probably just hope that one day you will have had enough and you will quit and then they won't have to do anything about it nor pay you unemployment. Probably how she's kept her job for so long and how most people like that do. I'm not saying stick it out to try to get her fired and put yourself through hell, but if you have to stay there at least make it count and get things documented if only for your protection in case you're fired and make sure you keep your own notes too. And if they get sick of you complaining about her and try to fire you for that, I'm sure that's against some law too like retaliation or something. Worth taking a bit of time looking into before it's a problem and maybe can even help you navigate this situation.