It is not valid to say that British people are mostly antisocial or any other characteristic without proper evidence and data.
The term "antisocial" refers to behavior that goes against social norms, lacks regard for the rights and feelings of others, or exhibits a pattern of disregard for societal rules and norms. Antisocial behavior is not limited to any specific nationality or culture; it can be found in individuals from various backgrounds and countries.
It is essential to avoid stereotypes and recognize that people's behavior is shaped by a complex interplay of factors, including cultural, environmental, and individual differences. Different cultures may have unique norms and customs that can influence social behavior, but this does not mean that an entire population is antisocial.
Social behavior and interactions can vary widely from person to person, and it is crucial to treat each individual as an individual, rather than making sweeping assumptions about their behavior based on their nationality or cultural background. Encouraging understanding, empathy, and open-mindedness can help foster positive interactions among people from diverse backgrounds.