Wishing it were not so will not make it go away.
As per Merriam-Webster, McCarthyism
Main Entry: Mc·Car·thy·ism
Pronunciation: m&-'kär-thE-"i-z&m also -'kär-tE-
Function: noun
Etymology: Joseph R. McCarthy
: a mid-20th century political attitude characterized
chiefly by opposition to elements held to be subversive
and by the use of tactics involving personal attacks on
individuals by means of widely publicized
indiscriminate allegations especially on the basis of
unsubstantiated charges; broadly : defamation of
character or reputation through McCarthyite tactics
- McCarthyist adjective
- Mc·Car·thy·ite /-"It/ noun or adjective
IMHO, we should return the favor and call most of the left and the media Stalinist, Communist, etc., when they go with the ad hominem attacks, regardless of the issue, but most especially when they pretend to scientific wisdom as they almost invariably portray the right as Know Nothings and Luddites.
Maybe the nuts are. The scientists are actually doing research.