To enforce segregation among whites and blacks.
More Information To support this is:
They were laws designed to enforce segregation of blacks from whites, Jim Crow laws were state and local laws passed from the end of Reconstruction in 1877 through the mid-1950s by which white southerners reasserted their dominance by denying African Americans basic social, economic, and civil rights, such as the right to vote.
Hope I helped.
Because the southerners wanted to take away the rights of african americans.
