Propaganda strategies can lead to public prejudice and hostility towards a certain ethnic or cultural group in many ways. Here are some common methods: 1. **Stereotype**: Using simplified and exaggerated labels to emphasize certain negative characteristics, such as violence, laziness or immorality, to promote negative views of the group. 2. **Negative narrative**: Spreading negative stories about the group through stories, movies, news reports and other media to create the impression that they are a threat or harm to society. 3. **Selective information dissemination**: Deliberately selecting and disseminating information that only focuses on the negative behaviors or events of a certain group, while ignoring their positive contributions and good behaviors. 4. **Creating hostile opposition**: By emphasizing the differences between "us and them", intensifying oppositional emotions and inspiring people's fear and anxiety. 5. **Spreading false information**: Spreading false information or rumors about the group to make the public form a wrong perception. 6. **Exploiting social unrest**: During social crises or economic difficulties, propaganda is carried out to target specific ethnic or cultural groups and accuse them of being the root cause of the problem. 7. **Emotional exploitation**: Creating fear, anger and anxiety, attracting public attention in an emotionally driven way, and increasing hostility. 8. **Celebrity effect**: Influencing the public's view of a certain group through the support or opposition of public figures or celebrities. 9. **Social media manipulation**: Using social media platforms to spread biased content, create a sensational effect, and make these biases widely spread among the public. 10. **Education and brainwashing**: Instilling bias against a certain group in the education system, influencing the values and worldview of the younger generation. All of the above strategies may invisibly deepen social divisions and confrontations. Therefore, it is very important to promote tolerance and understanding, eliminate prejudice and hostility, and jointly build a diverse and harmonious society.