I don't think you're evaluating it correctly. Black people don't claim all whites are racist, Just like a billion brown Indians don't claim 70 million white Brits are racist for what they'd done. However racism is present still at large and directed towards the coloured people still. The fact is racism was somewhat a cultural things for a large section of whites. While Americans used to have blacks as pets, Belgian rulers used to cut hands of black children for not being able to work properly or white Brits used to hang Indians coz they felt later were too uncultured to even considered as human being..all those things somehow made a strong impact on colored people and a large section still find whites as racist. I mean you won't see blacks having white slaves do you?
So in present day, what I believe some black people harbor that hatred in them for the whites and done from those some want to give it back. This is exactly what happened in Zimbabwe and going to happen in RSA. He'll, south African blacks are even hating Indians.
