That's, like, totally real brutality
Testimony is priceless, and those who are telling these real brutalities are heroes.
Testimony forms history which will inform learning.
After this is all over, it's this evidence which will be used to make sure this never ever happens again.
No one believed the holocaust was happening at the time, or for a while afterwards.
White supremacists in south Africa may have not all been aware of what was being done in their name during apartheid.
But apartheid was defeated, and the truth came out. 
Thanks for posting elements