When the police use excessive violence in the performance of their tasks, it is indeed possible for community residents to have a negative prejudice against their violent law enforcement and abuse of power. This phenomenon is not uncommon in real life, especially in the context of growing global attention to police violence in recent years. The following analyzes this phenomenon from the perspective of psychology, sociology and practical cases： ### 1. **Psychological mechanism: prejudice and loss of trust** -**Cognitive bias**: When community residents witness or hear incidents of police abuse of violence, especially against vulnerable groups (such as ethnic minorities, low-income people, etc.), it is easy to form “representativeness heuristic”, that is, a single incident creates a negative impression of the overall police group. impression. For example, after the George Floyd incident in the United States, many people's trust in the police system dropped sharply. -**Emotional response**: Violent law enforcement can cause public anger, fear, and powerlessness. These emotions may solidify into long-term negative attitudes towards the police. ### 2. **Social impact: deterioration of group relations** -**Breakdown of community relations**: Police violence will intensify the confrontation between the community and law enforcement, especially in societies that have historically been conflicted due to issues such as race and class. For example, studies have shown that after an incident of police violence, the community's reporting rate and willingness to cooperate may be significantly reduced. -**Collective memory and stigmatization**: Repeated violent incidents will form a "collective memory”, resulting in the stigmatization of the police as “oppressors” rather than “protectors.” This stigma may be passed on from generation to generation, further deepening prejudice. ### 3. **Case support: conclusions of empirical research** -**Experimental data**: According to a survey by the Pew Research Center in the United States, about 60% of Americans believe that the police use excessive violence against black people. This perception has significantly affected the public's evaluation of law enforcement. -**Specific incidents**: For example, in the French “Yellow Vest” movement, the violent suppression of the protestors by the police led to a strong backlash in public opinion, and even triggered criticism of the French police culture by the international community. ### 4. **Complexity and individual differences** -Not all communities respond in the same way: if the police have previously established a good relationship of trust in the community, the impact of individual violent incidents may be partially buffered. Conversely, if there is already a contradiction, the negative bias will be more serious. -**Exceptions**: Some communities may choose to tolerate violent law enforcement due to their priority needs for “law and order” (such as hard-line law enforcement supporters in high-crime communities). ### 5. **Systematic perspective: Institutional and cultural responsibilities** The public's negative biases are often not only aimed at individuals, but at the response to systemic problems. If the police department lacks an accountability mechanism (if the police involved are not punished), prejudice will further deepen. ### Conclusion The negative prejudice of community residents against police violence in law enforcement is the result of multiple factors, including psychological cognition, historical background, and social relations. This bias may undermine the effectiveness of law enforcement and form a vicious circle. Solving this problem requires transparent accountability, community dialogue, and systematic reform, rather than just relying on the behavior of individual police officers to correct.