There are many different reasons why people might behave rudely towards others.
Some possible reasons include:
Stress or anxiety: When people are under a lot of stress or anxiety, they may act in ways that are out of character or that they later regret.
Lack of empathy: Some people may not be able to put themselves in others' shoes and may act in ways that are inconsiderate or hurtful.
Miscommunication: Misunderstandings or miscommunications can lead to conflicts and rudeness.
Prejudice or discrimination: Prejudice or discrimination based on factors such as race, gender, or sexual orientation can lead to rude or hostile behavior.
It is important to remember that people's behavior is often influenced by many factors, and it is not always possible to know exactly why someone is behaving in a particular way. If you are experiencing rude behavior from others, it may be helpful to try to remain calm and to communicate your feelings and boundaries clearly. If the behavior persists or is especially hurtful or harmful, it may be necessary to seek support from friends, family, or a mental health professional.