I'm interested in this from a rhetorical/definition perspective. Many here use "McCarthyism" more in the narrow sense, referring to a witch-hunt on "communists." But since Russia is not communist, the red scare definition is a bit off base, but still probably understood by most readers.
However many people use it, as your sentence does, in the broader definition: reckless unsubstantiated ad hominem attacks.
And yet, this second reference, the broader use, seems to reflect DT actions, whereas the 1st use now refers to targets of government officials by MSM and other government officials.
But McCarthyism did not just target government officials, but also artists, writers, many from the entertainment industry, academia, mass media and unions.
So who is targeting all of these?
(But at least McCarthy didn't attack Science itself.)