The expansions of the Voortrekkers and the British was concurrent with an expansion by the Zulus under Shaka. Someone always gets disenfranchised if you go back far enough.
This isn't quite the same. They are not proposing giving the land to people who actually work it, but based on historical claims to ownership.
This generally means giving agricultural land to non-farmers which often benefits no one.
For example,
"A recent report by the Financial and Fiscal Commission shows that the potential of land reform as a mechanism for agricultural development and job creation has largely gone unrealised.
A survey by the commission in three rural provinces (Limpopo, KwaZulu-Natal and Eastern Cape) found that most land reform farms show little or no agricultural activity. On-farm beneficiaries earn little to no income, and the majority of beneficiaries seek employment on surrounding commercial farms instead of actively farming their own land.
Where land reform farms are in operation, they operate below their full commercial potential and have a strong bias towards subsistence agriculture. Across sampled sites, crop production had decreased by 79% since conversion to land reform.
This dramatic decline has serious implications for employment in the affected areas: land reform farmers no longer cultivate labour-and skills-intensive crops such as vegetables, citrus and tobacco on the land that once sustained these crops. In the three provinces surveyed, job losses averaged 84%, with KwaZulu-Natal suffering a 94% job haemorrhage."
It's also not 'elites' being targeted, but one particular group. When you get a very corrupt government looking to protect its own interests, a scapegoat for why the population is still poor is very convenient. Historically, this doesn't end well for the scapegoat (Ethnic Chinese in places like Indonesia and Vietnam are recent examples).
Land reform is not intrinsically problematic, it depends on how it is carried out. Seizure without compensation for somewhat arbitrary redistribution along racial lines doesn't seem to me to be a particularly ethical or effective way to go about it.