I don't think that partiality is a positive trait and it could lead to any positive result. Therefore, it is good in no sense as it will only create disharmony among people.
A war among people who live in the same country is a civil war.
Social capital describes the pattern and intensity of networks among people and or among members of the same ethnic group; it is good for 'getting by' in life.
When friendships tend to be concentrated among people of the same rank.
Price fixing
Price fixing
downward
plague
Gay people have exactly the same range of good characteristics that straight people have.
epidemic
Competition among various enzymes for same substrate
Good vacation spots are not segregated. The good ones for black people are the same as for white, brown, red, yellow, green and purple people.
The vast majority of people in any country are good people. Your nationality does not affect how good or bad a person you are. There are bad people in China and there are good people in China, so they are exactly the same as any other country in the world. Chinese people are very kind people