I always find it strange that people get so worked up by Afrikaner self-determination. A quick trip around Google will make it clear that there are many, MANY groups that pursue self-determination.
Africa
Asia
Europe
North America
Oceania
South America
There is even a global organisation that pushes their agendas -
Unrepresented Nations and Peoples Organization. Armenia, East Timor, Estonia, Latvia, Georgia, and Palau are former members that are now fully-fledged and internationally recognised states.
No, I don't want to live in an Afrikaner enclave, but I do understand that certain people want to be on their own and embrace their own identity (culture, language, religion, ethnicity, etc).