History

A better question is why you would take anything Richard Bernstein says seriously? He was literally one of the prime purveyors of the myth of 'China killed hundreds of students in Tienamin Square', plastering the claim throughout the New York Times and other newspaper publications without evidence for years, and crying 'authoritarian cover-up' when the historical evidence didn't actually reveal his story to be true. As well, he was among the first liberal critics of 'multiculturalism' and was an obvious American exceptionalist.

To this, I would suggest that Bernstein is knowing he is being flippant, as if he was a serious scholar (which he was not) and not just an Ivy League educated propagandist for the NYT rebranded as a 'scrappy hard nosed truth teller', he would know he is actually under the obligation to prove that other companies have just as much responsibility for the Holocaust as IBM. If he disagrees, he is under the obligation to provide sources for his disagreement. None of his 10 books actually address this issue, which means he did not. As such there is no reason to take his criticism as anything other than another flippant book review from the New York Crimes.