The Anglo-Boer war was a small skirmish blown out of proportion. The Afrikaners did not just move on from this minor incident, they used it as an excuse for job reservation for poor whites, actively cultivated a Afrikaner business elite with the help of the state, drove African farmers who where competing with white farmers off the land, reserved the right to vote for themselves and used Africans as oxen to generate the wealth they needed to "move on". They did all this things using their suffering at the hands of the British  as a justification, and of course, as you put it, they wanted to "move on".