You say this as if "socialism" and "communism" aren't routinely deployed as scare words against everyone to the left of Mitt Romney. That paranoia is still present — it just goes unnoticed because the censorship campaign was largely successful.
This is "whataboutism." Rather than relate to validity (or invalidity) of my point, you are re-framing the argument ("You say this as if") in a way that suggests I need to defend someone else doing something else.
It’s not whataboutism — I'm disputing your implication that censorship is an illiberal exception to the norm. You would have the reader believe that there is a unique and notable paranoia surrounding accusations of white supremacy, when in fact it's a fairly typical manifestation of the proud American tradition of suppressing "problematic" viewpoints.
FWIW, I read the parent as agreeing with your overall claim, but pointing out that the situation is actually even worse than you implied. (Namely, that the communist witch hunt never really stopped, and is ongoing concurrently with the white supremacist witch hunt.)
