I'm not quite getting your point about Willam L. Shirer. So, he's a very famous historian focused on WW2.
The article I posted is an interview with a Dutch historian with a particular focus on the history of anti-Semitism and Christianity, Hans Jansen. (Which is a common name, and there is a more famous Dutch scholar of Islam (now deceased) with the same name, but I do not believe they are one and the same person.)
This Hans Jansen has written several books on antisemitism through the ages, but unfortunately they are only in Dutch.
This one is roughly translated as "Christian Theology After Aushwitz".
Unfortunately, I haven‘t read Jansen‘s book yet, but I do have a beef with Shirer: his famous book is a work of craftsmanship, hot historiography. He wanted to portray teh German people as uniquely evil and antisemitic. Towards this end, he dismissed every evidence that would contradict his claim.
Furthermore, he was entirely unfamiliar with the research and writings of West German historians of the 1950s, of which there were many good ones, published in the Vierteljahreshefte für Zeitgeschichte in Munich. He did not mention any of that material as a source, sadly.
That makes his work a pamphlet, like that of his successor in spirit, Daniel Goldhagen, whose works are, from a scholarly standpoint, highly dubious at the very best.
It would be like stating that America had been founded upon nothing but genocide, wars and slavery, both of Africans and of indentured servants - and because of this all Americans were had the nature of hardened murderers, or other balderdash of that kind.
We have read all of those frightful assertions a thousand times in the works of Communist (pseudo) science.
My experience is that not even the Nazis in their anti-American propaganda stooped to the level of the Communists. Hard to believe, yes, but true.