Whites and native americans have a significantly higher suicide rate than others. And rates are increasing, esp for young people. These young terrorists seem to me to be committing suicide; but they're angry as well as hopeless, so they want to take others with them on the way out.
http://www.sprc.org/racial-ethnic-disparities
http://www.sprc.org/scope/age
I think young people need to talk about this and help figure out how to get peers connected to life, instead of participating in a march to nowhere.