Why Did African Americans Be Allowed To Register To Vote?

There are many reasons that the African American community was scared to register to vote on their own for example African Americans would receive threats by the whites and or KKK if they did and some of those threats were carried out in the form of car and house bombings, beaten to death or near death, hangings and many other forms of violence. Another reason why the African Americans in the South, especially in the state of Mississippi did not register to vote on their own was because they simply did not know how to read/understand how to register themselves. This caught the attention of many people up in the northern states of the country and it made the organizations SNCC, COFO, NAACP, and SCLC wanted to get involved and better the South but their main focus was the state of Mississippi, which was the most prominent at putting down the African American community.
However before these organizations would allow the volunteers to go down to Mississippi and go after what they planned on accomplishing the volunteers were put through very intense and severe training to with stand any type of encounter with the people of Mississippi that did not approve of what they set out to do. For example the training consisted of learning how to take on a beating from a mob of people without retaliating to the mob and preparing them to persecuted, beaten or even brutally killed. These volunteers had to be careful from all the dangers in the state of Mississippi because dangers to them came from all angles including the local white population, the KKK, and local/state