You have a point here. Trouble is just when the DA was becoming a credible opposition to the corrupt ANC , Zille had to make her silly tweets about Colonialism being "not all bad" and blacks "having to be grateful to their white saviors". Zille could have got much more political mileage by simply pointing to Zupta corruption.You can imagine how the Zille tweets felt to those of us who could not become  angineers or accountants under apartheid because this was not allowed. (My elder brother , retired pyschiatrist living in the UK wanted to study engineering but had to study medicine . "Bantu could not study engineering in 1967) If you were not at the receiving end of apartheid ( I am 66 years old and know the worst), it is easy to say "get over it". Having said that , there is no doubt the ANC has to go. What is the alternative to corruption?The DA with people who think like Zille or the EFF which is not ready to govern ( in a corrupt way like the present ANC or otherwise )IMHO.