As humans, we have instinctual responses that are exacerbated by group influences. Riots are by definition violent in nature, it is violent group behavior. The larger the group the greater the amplification of that group behavior into potentially, Mob Frenzy. If the group behavior is violent, the larger the group the more magnified the violence. Mob Mentality phenomenon has occurred throughout human history, whether witch burning, religious zealotry, political protests or reaction to perceived racial micro aggression.
Mob Mentality and pack mentality, also lesser known as gang mentality, describes how people can be influenced by their peers to adopt certain behaviors on a largely emotional, rather than rational, basis. When individuals are affected by mob mentality, they may make different decisions than they would have individually. 
Crisis in Western Power Centers
At the present time, the western power centers are facing serious threats of dominance by powerful global fascist forces that have set the course of the mass Propaganda towards cultivating Groupthink, which is being explicitly designed to gradually drift the global population towards Technocratic Totalitarianism. The agenda of full cognitive capture through digital means is escalating now. Spiritual Warfare is the battle between the light that exists in the knowledge of truth versus the darkness that exists in the controlled narratives that are spun with deceptions and lies. The Spiritual Warfare is escalating against all of humanity, it matters not what your color, race, religion or creed is. More than ever we need to be able to rise above the Mind Control distractions of the NAA playbook of classifications and see ourselves as one species that represents the entirety of humanity.
During this phase it is imperative we learn how to use Critical Thinking and common sense in order to see the larger picture of the Divide and Conquer Tactics based on classifications, as they are coming for all of us, the entire human race, in all colors. It is time to wise up, abandoning the forced Groupthink rhetoric and its poisonous ideology from being aggressively asserted upon all of us as a traumatic based method of Psychological Warfare. A small minority of powerful twisted Psychopaths in the world ruling class are determined to assert full spectrum dominance and control over every aspect of our living biology, brain and nervous system, thought processes and perception of reality, as dictated on behalf of their NAA overlords.
Weaponizing Groupthink for Genocide
When groupthink is weaponized as a psychological warfare tool for swaying public opinion through fear, it can lead to mass hysteria and mob mentality that surfaces collective shadows and hidden phobias that spiral into panic. Those that spiral into panic have taken the emotional bait hook of the psychological warfare, then feed off of each other’s emotional and fear-based reactions, causing the group panic to swiftly escalated to incite mob hysteria. When the groupthink is weaponized into Mob Frenzy and rule, it lends to the destructive tendency of all or nothing thinking in order to demonize those outcast groups that are not in submissive agreement with the core ideology and its methods. The angry mob searches for those they can scapegoat or persecute through displays of public shaming or grandstanding to make public or political examples of, in order to further spread their poisonous ideology which is based on coercion, intimidation, and aggressive violence. This is the classical set up used as the roadmap for Genocide 101.