People should respect each other and behave politely, otherwise people can't get along well. Even a rude behavior will lead to war between countries.
Historically, as long as they have made contributions to the country and the people, the people will not forget them, nor will those who have harmed and exploited them. This kind of person will be notorious after death even if he enjoyed prosperity before his death. History will not forget them, nor will the people forget them. Everyone's behavior will go down in history.