The amount of misinformation spread by Extro is concerning and actually offensive.
The black civil rights movement, as espoused by MLK, was non-violent protest within the law. There was nothing unlawful about engaging in sit-ins etc to change the law
The segregationists opposed these (by waterblasting them, lynchings etc) because they are racists. Not because they were concerned about the black people breaking the law, ffs. Indeed, sit-ins etc are protected under the US Constitution (freedom of association, expression etc).
But yes, these segregationists may have thought they were enforcing the will of G-d in the same delusional way the Extro thinks she is.