As a result of Smuts' and van der Byl's views, not only did the
South African Party government lose the June
1948 general election to the National Party (who would start and continue
Apartheid in South Africa for the next 46 years), but they lost their own seats in their respective constituencies. However, van der Byl managed to win the seat for
Green Point (a suburb of Cape Town) in October of that year. Van der Byl kept his seat in Green Point until his retirement in 1966. During his years in opposition, van der Byl's views on National Party government policy never changed, he vehemently continued to openly criticise the
Apartheid regime for its extreme suppression of the non-white population and its transformation of South Africa into a republic. He especially sympathised with the Coloured community of the Cape, who had been highly respected by the South African government before 1948. Certain members of the community had been given the right to vote since the days of the Cape Colony. The
National Party stripped them of this, and many other rights which outraged van der Byl. Although van der Byl opposed segregation and the oppression of the Black population, van der Byl did not believe in majority rule. He believed that the tragedies that occurred in African nations after independence, such as the
Congo Massacres and the widespread rapid degeneration of most states, was a result of the African population not being prepared for independence and the colonial powers relinquishing power too quickly. Van der Byl was a supporter of
Rhodesia, where he feared that independence would lead to disaster. He was also critical of the British Government's decision to place sanctions on South Africa and Rhodesia, as he believed that the Rhodesians and South Africans had loyally come to the aid of Britain during the World Wars, both militarily and financially. However, in van der Byl's case, the dislike with the National Party extremists was mutual, and he later bought the bench on which
Verwoerd was murdered. In 1966, after creating an uproar in the parliament for harshly voicing his opinion on a government policy, he was asked to leave the parliament for the session by the speaker. Van der Byl (aged 77) considered that it was enough after 37 years of politics and retired. ==Retirement==