people who vote for sig heils are nazis

I mean, I would say his obsessions with sexuality and what he viewed as "depravity" is dated. Not to mention his sketch of German history which leaves one with the impression that authoritarianism and war are the natural ends of German culture. Valuable as a primary source - one can see where, in 1960, it would be hard to envision a peaceful, democratic Germany after the experience of the 19th and early 20th centuries - but I don't think it should be read today without some good framing of its flaws. Here's Evans on the subject:

Shirer’s book has probably sold millions of copies in the four decades or more since its appearance. It has never gone out of print and remains the first port of call for many people who want a readable general history of Nazi Germany. There are good reasons for the book’s success. Shirer was an American journalist who reported from Nazi Germany until the United States entered the war in December, 1941, and he had a journalist’s eye for the telling detail and the illuminating incident. His book is full of human interest, with many arresting quotations from the actors in the drama, and it is written with all the flair and style of a seasoned reporter’s despatches from the front. Yet it was universally panned by professional historians. The emigré German scholar Klaus Epstein spoke for many when he pointed out that Shirer’s book presented an ‘unbelievably crude’ account of German history, making it all seem to lead up inevitably to the Nazi seizure of power. It had ’glaring gaps’ in its coverage. It concentrated far too much on high politics, foreign policy and military events, and even in 1960 it was ‘in no way abreast of current scholarship dealing with the Nazi period’. Getting on for half a century later, this comment is even more justified than it was in Epstein’s day. For all its virtues, therefore, Shirer’s book cannot really deliver a history of Nazi Germany that meets the demands of the early twenty-first-century reader