That is a really good question Bren! Obviously, the Whytes involved in the killings of Black Americans and the burning down of their successful businesses, knew, the Whytes who witnessed or heard about such actions by their fellow Whyte citizens, knew, but those in charge of transmitting th official narratives in the history books, and the mass media, ALWAYS OMIT mention of this pattern of vicious attacks.
The success of all people designated as 'inferior' in the Whyte supremacist discourse, threatens to reveal the utter lies upon which Whyte domination is founded:- not their civilisational superiority, but their capacity for collective, unabated vicious acts of intimidation and violence.