It seems like calling it a collection of dog whistles is directly addressed by this paragraph:

"The trouble is that Nazis are human beings, and they have many benign thoughts along with their antisemitism. So I might avoid repeating some ordinary, unthreatening statement uttered by someone with a Nazi reputation, lest you think that I sound like a Nazi. Soon only actual Nazis and a few weirdos who don’t care what other people think are willing to repeat these unthreatening statements — which now appear rather threatening. In this regime of self-censorship, even arguments defending academic freedom (which is not a traditional Nazi commitment!) or aesthetic judgment (a commitment shared by many people, including a few Nazis) can look like signs of crypto-Nazism. This increases the costs of honest discussion."