Johannesburg - The ANC has called former president Nelson Mandela's assistant Zelda La Grange a "spoilt white person", Netwerk24 reported on Monday."She preaches non-racialism to protect white people. Now she's sowing racial division," said ANC Secretary General Gwede Mantashe in an Afrikaans report translated by Sapa."Non-racialism is about the total destruction of white domination. So we're fighting against the system and not against white people," he reportedly said.La Grange sparked a debate on Twitter on Saturday after saying she felt white people were not welcome in South Africa."If I was a white investor I would more or less leave now. It's very clear from Jacob Zuma whites are not wanted or needed in South Africa," she tweeted."I'm SICK of Jacob Zuma's constant go at whites every few months. Why can't we co-exist without it having to be at the expense of one another?”Her tweets were in reaction to Zuma's recent comments that the country's problems began with Jan van Riebeeck, a Dutch administrator who set up a refreshment station in the Cape in 1652.Mantashe said it was a fact that South Africa was colonised by white people."They didn't come here and find the country empty. Racial division is rearing its head again because spoilt white people are driving it."La Grange has since apologised for her tweets.