Why did white louisianians feel threatened by African Americans attaining equal rights

The white people in Louisiana were not fond of the fact that the African Americans can gain equal rights at all. They felt threatened in multiple ways but such a decision. Some of the things that scared the white people of Louisiana was that they will suffer economically, because there will be no more slaves, but only people that they will have to pay to work on their farms. Also, they feared that the African Americans might try and take their revenge on them because of the torture they experienced while being slaves. Other thing was that they were looking at the African Americans as lesser and primitive people, so they did not fancied the fact that the cultures and the people will start to mix with each other.