Kate got roasted for years in the press.
Mail story from 2010 about Kate Middleton: "SANDRA PARSONS: Wedding or not, it's time Waity Katie grew up..."...
2007 Mail story about how common Kate's family is and how awful her mother is:
""Kate's background was always a bit of a laughing point among William's friends. They openly mocked her mother's air-stewardess credentials, greeting Kate with a whispered chorus of "Doors to manual".
A few years ago the whole Middleton family regularly got hate in the press:
"Why Kate Middleton's very pushy siblings are worrying courtiers | Pippa middleton ...".
In 2008, kate was being branded lazy with no ambition in the press:
"Kate Middleton, once cruelly dubbed “Waity Katie” by the British media might now be called “Lazy Katie” – a reference to the fact that she recently quit her job in order to “prepare for her future life,” according to palace officials."
MM's slagging off is not racist. Its always gone on, whatever colour you are.