Introduction:
Serbjit is a character who gets angry when people do not believe him. This anger stems from a feeling of disbelief and mistrust, which can be frustrating for him. In this response, we will explore why Serbjit reacts this way and the factors that contribute to his anger.

Reasons for Serbjit's anger:

1. Lack of trust:
- Serbjit becomes angry when people do not believe him because it indicates a lack of trust in his words and actions.
- This lack of trust can make him feel devalued and disrespected, leading to frustration and anger.

2. Feeling misunderstood:
- Serbjit may also get angry when people do not understand him.
- When others fail to grasp his intentions, thoughts, or emotions, it can be frustrating for him.
- This frustration can manifest as anger, as he may perceive it as a lack of effort on the part of others to understand him.

3. Importance of validation:
- Serbjit may seek validation from others to affirm his beliefs and actions.
- When people do not believe him, it can undermine his self-confidence and sense of worth.
- This lack of validation can trigger anger as a defensive response to protect his self-esteem.

4. Need for cooperation:
- Serbjit's anger may also arise from a desire for cooperation and support from others.
- When people do not cooperate with him, it can hinder his progress and goals.
- This frustration can lead to anger, as he may perceive it as a lack of support or hindrance to his endeavors.

Conclusion:
In conclusion, Serbjit's anger stems from a combination of factors, including a lack of trust, feeling misunderstood, the importance of validation, and the need for cooperation. When people do not believe him, it challenges his self-worth and hinders his progress, leading to frustration and anger. Understanding these reasons can help foster better communication and empathy, reducing the likelihood of anger in interactions with Serbjit.