I see. Thomas Sowell, who is black, has an issue with how liberals and anti-racist activists see racism in the USA*. He can’t be wrong about that because he’s black.
There are plenty of other Jewish Holocaust historians, including the Auschwitz Institute, who disagree with him. Do they become wrong because another one says something different? I think his claims are wrong and comments to be biased.
*I do not have much agreement with him on this or other topics.