It speaks to the huge problems of racial, religious, and socio-economic inequality that is deep rooted in this country. We've failed as a nation to realize it and address it, hiding behind nationalism and economic prosperity. Those who are ignored are now speaking up, loudly.
This is what happens when we pretend that everything is ok, we're the best, and everyone who says otherwise is a freedom hating traitor.
The disenfranchised are rising up. It just so happens that many of these folks are bigoted, racist, sad, angry humans.