Why did Mississippi likely make it legal to promote racial equality

Mississippi likely made illegal to promote racial equality because of Anti-miscegenation laws mainly.

Explanation:

Anti-miscegenation laws were one of the laws that many southern states adopted as they believed that it was not right to consider white and black people as equals in society, it was stated in many of these laws that the interaction between different races should be limited in many areas since they were not allowed to have a romantic relationship or get married, and the people who protested against it or supported the equality of rights were considered criminals as well.