I have a white south african freind. I dont think poorly of them at all and I dont know any fellow kiwis that do.
I’m not a kiwi, but I’ve heard that former white Rhodesian’s are somewhat looked down upon there because of the preception that they all had a Black African cook and a housemaid, and a driver, etc. Like a silver spoon in the mouth, at the expense of natives. And then that perception is sometimes also cast on White South Africans.
Like I said, I’m not a Kiwi (unfortunately) this is just something I read on an expat forum long ago.