Then you are no different from other South Africans abusing black immigrants in South Africa.
You believe in collective guilt and collective punishment, the same being used against you in the UK by racists whenever an immigrant commits a crime.
How about dealing with people on an individual basis? Imagine losing a good friend because you believe in collective guilt. Can’t be me.
I have a South African friend in the UK. I bluntly told him that we can no longer be friends because of what his fellow South Africans are doing to other Black immigrants in their country.