Is there any future where they don’t end up either mostly killed or kicked out of the country.
To me there are a few scenarios that might happen or are at least some suggestion for what should happen.
1. All the areas in the country of South Africa where white are a vast majority are given near total autonomy
2. Civil war breaks out where a lot of civilians are killed on both sides but a combination of a high death count and foreign pressure the boers are give a chunk of the country as a autonomous area where they hold most control or it becomes a nation. Or South Africa can balkanize With the other separatist movement gaining new support
3. The boers get to sell there land and all move to one sector of the country. Being given a large chunk of land to farm, mine, improve, and develop. Having many of the natural resources in South Africa could also give them a good head start. Which will create a government that loathes South Africa wanting nothing to do with it. Being higher disciplinary, culturally European, and Christian(with some of that mainly because they want to distinguish and avoid the South African government) with militarized border.
4. they have their land taken away, Are deported from South Africa, and are moved to country’s like Britain, Belgium, the Netherlands, and Russia. Wherever they go being nothing but a reminder the modern day oppression kicked out of there own homes and the end of a failed state. Being bigot, bitter, and rightfully angry at everything. No matter where they go they harbor the view that they hate what South Africa stand for. simply wasting away with South Africa. As the most promising nation in Africa starves. it Simple sucks