What would happen if the plessy vs ferguson cased was overturned in the court of today

Plessy v. Ferguson was important because it essentially established the constitutionality of racial segregation. As a controlling legal precedent, it prevented constitutional challenges to racial segregation for more than half a century until it was finally overturned by the U.S. Supreme Court in Brownv. For some fifty years, the Plessy v. Ferguson decision upheld the principle of racial segregation. Across the country, laws mandated separate accommodations on buses and trains, and in hotels, theaters, and schools. The Court's majority opinion denied that legalized segregation connoted inferiority.

Explanation:

unless they converted, many non-christians (mainly jews and muslims) were persecuted