The US Supreme Court's decision in Plessy v. Ferguson,(1896) upheld laws allowing racial discrimination, colloquially known as "Jim Crow" laws. The Court declared these laws were constitutional and not in violation of the Thirteenth or Fourteenth Amendments as long as African-Americans were provided "separate but equal" accommodations (which was rarely the case).
The US Supreme Court's decision in Plessy v. Ferguson,(1896) upheld laws allowing racial discrimination, colloquially known as "Jim Crow" laws. The Court declared these laws were constitutional and not in violation of the Thirteenth or Fourteenth Amendments as long as African-Americans were provided "separate but equal" accommodations (which was rarely the case).
Making Plessy change his seat violated his equal rights under the constitution
making plessy change his seat violated his equal rights under the constitution-apex
In the case of Plessy v. Ferguson, Plessy's legal team argued that Louisiana's Separate Car Act, which required racial segregation on trains, violated the Thirteenth and Fourteenth Amendments of the U.S. Constitution. They contended that the law denied Plessy equal protection under the law, as guaranteed by the Fourteenth Amendment. However, the Supreme Court rejected this argument and upheld the constitutionality of "separate but equal" racial segregation.
making plessy change his seat violated his equal rights under the constitution-apex
Plessy v Ferguson, a Supreme Court case in 1896, established the "separate but equal" doctrine, which allowed for racial segregation in public facilities as long as they were equal in quality. This decision strengthened segregation laws and made it more difficult to challenge them legally. It provided a legal basis for continuing racial discrimination and limited the ability of those fighting against segregation to argue that it violated the rights of African Americans.
Plessy v Ferguson made the fight against segregation more difficult by establishing the "separate but equal" doctrine, which allowed for the legal segregation of public facilities based on race. This decision legitimized and perpetuated racial segregation, undermining efforts to challenge discriminatory practices and maintain racial inequality for decades to come.
The fourteenth amendment gave him the right to equal treatment on a train. APEX :)
The decision allowed segregated facilities throughout the United States, and established the constitutionality of laws that established segregation. It was overturned in 1954 by Brown v Board of Education of Topeka, which had the effect of making all US segregation laws inherently unconstitutional. The Civil Rights Act of 1964 further invalidated any laws that deprived minorities of their rights under the Constitution.
Countries want them, countries make the laws.
If your asking what case caused segregation, the case of Plessy v. Ferguson created the "Separate but Equal" doctrine which gave blacks and whites equal facilities, but they were separate. This case created segregation. Just in case you are asking for what case started desegregation, it started with the case of "Brown v. Board of Education" where it was determined that the Separate but Equal doctrine was unconstitutional and demanded that schools must immediately desegregate schools. PS. The case of "Plessy v. Ferguson" was used as a precedent in the case "Brown v. Board of Education". :)
Federal
It is not illegal because you cannot make up a law. Only the official legal system can make or repeal laws.