Why is it that minorities can get away with racism?

Im just wondering, yes there are white racists, but there are many (actually, most of us) that are not racist and are tolerant. My question is, why do minorities kind of, get away with it more? There is a mexican girl who i am friends with, and she is always saying how she hates black people (calls them goons too) and indian and middle eastern people..nobody says anything to her, where when a white person would say that, they would be in a lot of trouble..im just wondering..so dont get bitchy with me