the racism angle has been argued to death.. IMO she was racist. telling her to go home, calling her shilpa poppadum, liek shetty is so hard to pronounce comments about the way Indian people eat.. the other two girls were appaling, just not quite as aggresive. white trash is deeply unpleasant too... but in the USA, it is not a racist term, but a descriptive one, the same way chav is used here.
as betterhalf said, it was the ugliness of her aggression that was the most foul thing about her behaviour, leaving aside what she actually said.
making pejorative comments about a persons culture and heritage is racist, no? 'go home' is so absolutely racist, it is just not even worth arguing about . IMO.
at the end of the day she is ignorant and holds repugnant view points, whether or not we agree they are racist.