Can I ask you a question?
Do you seriously think the underlying problem goes away even if you will not have a single riot ever again? Are you willing to focus and pinpoint the actual wound in your society or are you actually conveniencing yourself to be sidetracked and point fingers at a few who expressed their anger in unlawful ways (and yes those individuals should be held accountable no question)? Are you willing to even debate the social injustice? I am not even talking about unequal opportunities. I am talking about gross social injustice: How nobody even touches on the issue of tax loopholes that cause losses in the billions while you cry out when you see a few kids (yes yes call them criminals if that appeases you) go on the street and burn cars. Inconvenient topic? I bet it is but if left untouched it will resurface again and again. You can conveniently call them mob/plebs or whatever you like but I think social injustice has reached so grand proportions in the US that issues like this will come back time and again to haunt your nation unless the actual problem is addressed. And the problem is: The law is not applied to each citizen in an equal way.
If we want to discuss the law not being applied to residents in an equal way and "social injustice" then we really should be discussing the treatment of Turks in Germany... but we will move on to the underlying issues with the riots.
The first and foremost underlying problem in the U.S. related to these riots is black activists such as Jesse Jackson, Al Sharpton and Rev. Barber stirring up racial animosity for their own fund raising purposes. The characters focus on stirring the racial pot to green mail companies and get extra grant money from government entities to enrich their personal lifestyles. Over and over again they have been wrong on the factual issues - take a look at the Tawana Brawley case, the Duke Lacrosse case, Ferguson... but they create a fabricated reality to fit their agenda. The entire agenda pushed from Sharpton and company is that white man is oppressing the blacks and the blacks need to protest (riot) to get what they need - a continuous "race grievance" industry. Sharpton & company needs to keep things stirred up in order to pull in more money. The fruits of their labor are looting and rioting in cities & towns across America.
Not once has any of these black activists attempted to address the real problems of the black community; lack of education, welfare dependency, drugs, fatherless families, and lack of personal responsibility via funding from their organizations. Who are their biggest critics? Real black activists who attempt make a difference in their local communities.
The associated problem is a culture within the black community focused on violence, mistreatment of women, drugs, and being a thug. All of this is glorified in rap videos and upheld as "proper" behavior. This culture needs to be turned around to focus on personal responsibility, getting educated, not doing drugs, proper respect for all people, getting a job, staying off of public assistance, and not creating fatherless children - as the standard for civilized behavior.
Just like many other countries, the U.S. has problems that we need to further address. These include the cost of education, medical coverage, policing, the legal system, money in politics, and others. The proper way to address these issues is through the political system, electing politicians who share your views and pushing for changes via calling/mailing their offices. Rioting in the streets will not improve anything - it will only have the majority of law abiding Americans demanding a sharp & immediate crackdown on the criminal looters.
One immediate solution for policing is requiring body cameras to be worn by all officers and the video to be preserved. Keep in mind that video regularly shows that the officers are correct well over 95% of the time. In instances where the officers do not act correctly then they need to disciplined or fired.
Even if you "fix" all the problems in the U.S. and offer free college education to everyone while providing food, housing, and money to them - there will still be a culture of "takers" who refuse to improve themselves via the free education (just like they did in K-12) and prefer to be criminals. So even if you offer all this opportunity - individuals must be step up and be PERSONALLY RESPONSIBLE - which is the entire issue in society, not "social injustice".