When analyzing the techniques and methods that affect public sentiment in extreme behavior cases, we can observe the following key strategies. These strategies usually combine the principles of psychology, communication, and social dynamics to manipulate or amplify public sentiment. The following are specific technical classifications and case descriptions： --- ###**1. Emotional control technology** 1. **Fear Appeal (Fear Appeal)** -**Method**: Cause panic by exaggerating threats (such as disasters, enemies, health crises) to force the public to take action or accept extreme views. -**Cases**: Violent videos released by terrorist organizations (such as ISIS) present an “existential threat”; the spread of false vaccine deaths in the anti-vaccine movement has exacerbated the public's distrust of the medical system. 2. **Mobilization of anger and hatred** -**Method**: Use social contradictions (such as the gap between rich and poor, racial discrimination) to incite opposing emotions and simplify complex issues into a binary narrative of “us vs. them”. -**Case **: Far-right groups have used immigration crime cases to render “white genocide" and incite xenophobic sentiments. 3. **Narrative of hope and salvation** -**Method**: Provide the “only solution” after creating fear, shaping the image of the savior or the legitimacy of extreme ideology. -**Case **: Extreme political movements promise to "completely eliminate corruption” or "restore traditional values” to attract groups dissatisfied with the status quo. --- ###**2. Information manipulation technology** 1. **Selective information filtering (Cherry-Picking)** -**Method**: One-sided display of data or cases that are conducive to one's own position, ignoring negative evidence. -**Case **: Climate denialists only cite local temperature drop data to deny the trend of global warming. 2. **False Consensus effect (False Consensus)** -**Method**: Declare that a certain extreme view is the ”consensus of the majority of people", forcing individuals to follow the crowd. -**Case **: The online navy creates false comments to create the illusion of ”the whole people support a certain policy". 3. **Repeat and simplify slogans** -**Method**: By repeating short slogans (such as "Stop stealing elections!" ”), strengthen memory and bypass rational thinking. -**Case **: Populist leaders use catchy slogans to simplify complex political issues. --- ###**3. Group psychological utilization** 1. **Strengthening of social identity** -**Method**: Strengthen the internal identity of the group (such as religion, ethnicity, and party affiliation), and create “internal group preference” and “stigmatization of external groups”. -**Case **: Extreme religious organizations use rituals and symbols (such as uniform costumes) to enhance their members' sense of belonging. 2. **Deindividuation (Deindividuation)** -**Method**: Weaken the sense of personal responsibility in collective action and encourage individuals to obey the extreme behavior of the group. -**Case **: Masked protestors in riots are more likely to commit violence, and their anonymity reduces moral constraints. 3. **Obedience to authority and worship of leaders** -**Method**: Shape the image of a charismatic leader and use the effect of authority to promote blind following. -**Case **: Cult leaders control the behavior of believers by deifying themselves (such as “prophet” and “savior”). --- ###**Fourth, enlarge the technical tools** 1. **Algorithm recommendation and information cocoon room** -**Method**: Use social media algorithms to push similar content, strengthen prejudice and isolate dissent. -**Case **: Extremist content spreads through YouTube's recommendation algorithm, attracting potential radicals. 2. **Deepfake and false evidence** -**Method**: Falsify images, videos, or audio recordings to create “evidence” to support extreme claims. -**Case **: Faking corrupt videos of political figures to incite protests. 3. **Instant messaging and closed communities** -**Method**: Spread extreme content through encrypted groups (such as Telegram), avoid supervision and enhance group cohesion. -**Case **: Extremist organizations use private groups to plan actions and share inflammatory materials. --- ###**5. Symbols and ritual construction** 1. **Use of symbolic symbols** -**Method**: Use symbols such as flags, signs, and colors to stimulate collective emotions. -**Case **: The Nazi swastika strengthens ideological identity through visual impact. 2. **Ritualized behavior** -**Method**: Design collective rituals (such as oaths, parades) to enhance emotional resonance. -**Case **: The extreme environmental organization "Resistance to Extinction” attracted attention through street sit-ins and dramatic performances. --- ###**6. Create a sense of urgency and time pressure** -**Method**: Declare that the ”window of action is about to close", forcing the public to make quick decisions when the information is incomplete. -**Case **: The narrative of “the country is on the verge of collapse and must be revolutionized immediately” is presented in the political movement. --- ###**Ethical Warning and Reflection** Although these technologies may work in the short term, they will intensify social division, weaken rational dialogue, and even cause violent conflicts in the long term. The public needs to cultivate critical thinking