Why not? Well, because it is a leftist slur against a man who was quite prescient and in turn, warned folks years ahead of events..
Sen Joseph McCarthy, back in the 1950s, was warning people how Soviet Communist sympathizers were even then, infiltrating the government,
the media, the film industry, community organizations and universities.
He also claimed that they were infiltrating the CIA and the atomic energy business. (later, the Rosenbergs, Walkers and others were apprehended..)
So, was he correct? Or should his name still be disparaged?