In the beginning, why were the non white south africans to end apartheid

they were not allowed to vote or hold office!

Explanation:

In 1948 the National Party wins the elections using the slogan "Apartheid". This meant that the group that was taking control had clear intentions to deepen the policy of racial segregation in the region. But in a black majority country, how was it possible for this party to elect itself? As you may have already guessed, only whites took part in the elections - blacks and other non-European ethnicities did not have the right to vote. It is at this point that the apartheid segregation regime is officially adopted in the country.

he sent troops to protect the students as they entered the school.