The LA riots, there was something to them, the antagonism of a virtually all white police force, the irritants of crack, the time and place. Even those riots didn't last long nor were exportable into some sort of wider social war.
You need to consider several things.
LA riots while at first were against the white man. Then it it was about retaliation. By the 3rd day though, it was an orgy of violence, with no racial division, but more of a pissed off city burning itself alive. If you look back to the LA riots, the national guard and police could not control what went on. They called in the marines from Pendleton after several days because it was so out of control, and it was only then that it all came to an end. You speak of how blacks have Barry as president, and Holder as AG, and all of these other things, how much advanced they are. The reality is, he hasn't done anything for minority communities, and they have realized that. Sure people were excited that he was black and elected to office, but most are seeing that he isn't doing anything to make their lives better.
Look at occupy. That didn't fizzle out over night, it became a reason to fight and argue with police, with ridiculous images of cops beating the snot out of crazed veterans dressed in partial military uniforms, dragging modern day hippies out of parks, and the right to protest vs's the right to maintain sanitation and cleanliness in city parks. Occupy had alot of support too.. from people both on the right and the left. The reality is that America, the "American dream" is gone. The jobs are taken by illegals, this is why minorities and high school kids can't go out and find a job. No matter how hard you work, you can't get ahead. All of the money and programs set aside by the government are on the brink of collapse. But worst of all, the banks, the financial officials entrusted with peoples money are swindling, sneaking, snaking people out of their money, while their CEO's get richer and richer, as the country collapses around them.
Lets look at the present day majority black community. Are they better off than they were during the civil rights era? No. In fact, theres a struggle within, between those who want to work, move up and out, and those who do not. Their communities are often plagued by violence, often perpetrated by their own neighbors. The idea of "family" is long gone, sometimes several generations back, with kids raising kids, kids raised in foster homes, no order, structure or anything. Drug trade and government dependence is a mainstay in many of these communities, gangs rule the streets, and everyone there is sold some sort of "idea" on "what needs to happen" but often nothing is actually done. The police often have an idea of what "needs" to happen, but either way them or the government is doomed in their plans. Locking up drug dealers = taking away fathers and brothers, loss of income, etc. Not locking up dealers = more turf/business based violence/killings, more poison sold on playgrounds and in schools, etc. Barry promised to fix this never ending cycle of destruction that occurs there, but he knows he can't. He understands what goes on there, but he doesn't care, theres no plan to fix this cycle and he knows it. They now know it too. Much of the frustration vented towards police there, is based on the fact that the police often come in and take said bad guys away, but it takes away incomes, it takes away role models and fathers, it doesn't fix the "problem." There aren't any decent jobs, theres no job training available, and even if there was, many cannot afford cars to get to work, or day care like other modern families. In some houses, the only reason the water and power is still on is because its illegal for power companies and water suppliers to shut it off in some areas. Social services is tapped to the brink, foster homes have become "group homes" and defacto modern day orphanages. There is no system of crime and punishment, because the courts are so liberal that its literally a revolving door for many offenders. These communities literally exist in a hot zone for this reason, filled with part 1 violent repeat offenders, high concentrations of murderers, violent sex offenders, and robbers/carjackers.
As a result of all of this, there is rage and frustration. Sheer anger towards the government and police for trying to put a band aid on this. The younger and older ones condone them going out, protesting, and even resorting to violence against the occupying government force. Gangs see it as a chance to take a shot at cops. Even the more vocal and political of the crowd, the black panthers urge violence against the authorities. Jesse Jackson and Al Sharpton may not openly condone it, but are secretly rooting for it. Heres why. Because Martin Luther King and the entire movement of civil rights didn't fix anything. People really didn't care when sit in's happened, and people marching around chanting, but America and the world paid attention when cities burned, and violence erupted. This is why there will be rioting and outbreaks of violence in this case. The case is simply an excuse to express rage for a bigger problem, by a growing group of people who simply weren't "raised" at all, for one reason or another.
With that being said, I defend my house and property with an assortment of firearms, bow, crossbow, and hand weaponry. If all these fools understand is violence, then I shall bring violence to them when they fail to obey the rules of society by breaking into my residence during one of their outbreaks of violence. I urge others to do the same, if you have the means to do so, and stand ready to defend your neighborhoods, homes, cars, and whatever else you worked hard for, against people who seek to take it because its "free" for the taking to them.