Racism comes to mind
That is called racism, racial bias, or discrimination on the basis of race.
Suspect Classification.
There is no biological basis for race, and the concept of different races is socially constructed. Therefore, it is not accurate or appropriate to categorize countries based on the so-called "yellow race." It is more respectful and accurate to refer to people based on their ethnic or national identity.
Discrimination means the unfair treatment of a particular category of people of things. This is normally done on the basis of race, age and sex.
The term you are looking for is "gerrymandering".
Discrimination.
Decathlon
The basis of social difference is usually found in race and class.
The separation of people based on their race is called segregation.
what do you mean by " coloured folk?" are you referring to people of a different race, if so please be more specific as to what creed or race they belong to, as for your question, all people who go to a court room to hear the proceedings will sit in the seats assigned to them by court staff.
Suspect Classification is a distinction made between individuals on the basis of race, national origin, alienage, or religious affiliation, especially in a statute, ordinance, regulation, or policy.
That is called discrimination, which involves treating someone unfairly or unfavorably based on certain characteristics such as race, gender, age, or religion. Discrimination can take many forms, including exclusion, harassment, or unequal treatment in different areas such as employment, education, or housing.