In efforts to prove that our society is not racist and that everyone is equal, I believe that we sometimes go too far in the other direction. If a white woman were to assault an indigenous woman because of her race, she would most certainly be made an example of. Society would be quick to use her to prove that we are not all racist and therefore she must suffer for her crime. If we do not then prosecute an indigenous woman for the same offense towards a white woman, then we are most certainly perpetuating a double standard.
Yes, there is a double standard on racially motivated crimes. When an assault takes place because the victim's race or skin color differs from those of his or her attackers, then the crime should be prosecuted as a hate crime regardless of whether or not the attackers are minorities or not.
We see perfect examples of this everyday in the news. If a white man attacks a black man everyone goes into panic mode and we hear about it on the national news. If a black man attacks a white man, nobody says a word. It always seems that if a person, whether man or woman, isn't white they are some kind of protected population. These people can do no wrong, but if a white man or woman attacks a person of color there will most certainly be some kind of uprising and protest and a whole of trouble over the situation.
The difference here is not that one's skin was a different color than the other. The issue lies entirely in the different cultures present. An indigenous woman is unlikely to have the same cultural norms, thus cannot be prosecuted in the same way. The law is not relative, but it does need to be appropriate.