She hyperbolizes; he gets all defensive. But on closer inspection, her basic point is not that inflammatory. Money quote:
Of course, the United States is not vulnerable to the violent, total closing-down of the system that followed Mussolini's march on Rome or Hitler's roundup of political prisoners. Our democratic habits are too resilient, and our military and judiciary too independent, for any kind of scenario like that. Rather, as other critics are noting, our experiment in democracy could be closed down by a process of erosion.
Warning about the erosion of liberty and democracy in a state geared for permanent war against an inchoate enemy is not exactly radical. But the f-word is regrettable. Both Wolf and Goldberg are using it for effect. But the threat of left-wing fascism in America today does not seem to me as pressing as the more traditional version.