Nigerian Girls vs. Native American Girls

It's admirable that people in the West are concerned about the Nigerian school girls kidnapped by Boko Haram guerrillas.

Why then are they NOT concerned about the greater number of native American girls who have been abused, raped, and murdered?

http://www.bsnorrell.blogspot.com/2014/05/mohawk-nation-news-canada-avenges.html

No doubt you remember the memorials for the American kids slain at Columbine HS in Colorado:

But have you ever given any thought to the native American children who died at so-called "Indian boarding schools" like the one at Carlisle, PA? Here is a view of the cemetery at that school:

It seems strange to me that we get all bent out of shape when certain children are abused, raped, or killed ... but not when other children suffer the same or a worse fate.

Clearly, Nigerian girls matter ... but why don't American Indian girls? Is it because Boko Haram is a Muslim group, and by US definition Muslims are bad?

Furthermore, to date the West's most important interaction with Nigeria since the end of the African slave trade has been the exploitation of their resources by Western oil companies. This exploitation has resulted in the death of numerous Nigerian citizens and horrendous environmental damage:

This environmental damage will have at least as great an impact on Nigerian men, women, boys, and girls as the crimes of Boko Haram. Are we all bent out of shape about that? If not, why not? Is it because the apparent bogeymen in this case are Western corporations and not so-called Muslim terrorists?