Is censorship strictly a liberal action?
What is censorship?
The word "censor" means "to examine in order to suppress or delete anything considered objectionable." It originated in Rome and usually consisted of two officials appointed to take the census and to supervise public morals. Censorship is the act of suppressing words, images, or ideas that are determined to be offensive.
Is this acceptable in modern times?
Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances.
This may only apply to Congress, but is it acceptable for private sector? Probably not.
To date, there are NO known, significant instances of censorship, by conservatives, only liberals.
So, yes, censorship IS strictly a liberal action.