IMHO it is because the minorities have been emboldened by the success of the militant lgbt group. They used PC to salt the society that abnormal is normal. They ReDefined rather than integrated Normal.
So, the Blacks and the extreme left are just applying a successful technique to politically make Race an issue. Not even a two term Black Pres voted by the majority of the voters has made any positive difference.
The "African" Americans have been in the US for 400 hundred years and they have failed to make any progress, or so little it doesn't matter in integrating into the US Culture. They failed and they want to blame it on the whites. In the the last several decades that whites have been blamed for anything bad. At the same time they are the unprotected class, and any violations against them have no way to undo. White people discriminate against other white people all the time, but unlike the "African" Americans there is no federal judicial or administrative recourse.
Blacks have do well in Music, Sports and Entertainment. But they have not done well in education, professional jobs and other areas. They have also been associated with gangs, and gang violence, and they are a substantial portion of the jail and prison population.
Thanks to 8 yrs of a Black president, they have increased their presence three or more fold in TV, Moves, and even advertisements. Yet, they are not happy.
Contrast them with the Chinese that in the 1800s were enslaved to work on the railroads. Today we don't hear about problems with the Chinese, or Asians except for maybe some gang affiliations.
The Vietnamese that came into the US because of the Vietnam War are also doing fine.
Asians of all types, even from India and Pakistan do well in the US because they all embrace Education. And they do better at it than the American Citizens of all types.
Those people that have done well for the image of the "African" Americans need to show the rest of them the way out. There is just so much that can be gained by Blacks once again going the violent route, and using it to kill, pillage and damage.
The "African" Americans have generations that never make it out of being poor and on welfare.
Congress and various presidents have allowed jobs that could be filled by these people to leave the country, but that is not what these race riots are all about.
it is about the failures of "African" Americans over 50 yrs&instead of blaming themselves they want to shine the light elsewhere