There's been a lot of talk about how the liberals have dabbled in censorship these days.
Please don't misunderstand what I'm about to say. Censorship is always bad, especially from anything left of center.
But I think people have forgotten the primary reason why it's so bad:

Because if liberals open the door to censorship, the right-wing will take up the cause with gusto.

This is the way it has always been historically.
And unfortunately, I think it's starting up again.

On Jan. 10, the school board in McMinn County, Tennessee, voted 10-0 to remove Maus from the eighth-grade history curriculum. The book, a graphic novel by Jewish American cartoonist Art Spiegelman depicting the grim realities of the Holocaust, expressed the absolute inhumanity of what happened in clear terms that children could understand.

As the child of Polish-born parents who lost much of his own family to the Holocaust, Spiegelman understood the gravity of the subject matter and committed himself to one clear idea: “Never again.”

To its great shame, the school board argued the book contained objectionable language and was unsuitable for use in the classroom. Despite pleas from history teachers concerning the importance and effectiveness of the work, the conservative school board chose to diminish its own school community’s understanding of the horrors of Nazism. Ironically, it did so by taking a tactic directly employed by Nazis themselves.

If it was just one book in one district, I wouldn't bother to write this.
Unfortunately, it's much worse than that.

Leander Independent School District (ISD) is a school district based in Leander, Texas. It covers a wide stretch of geography, including Leander, Cedar Park, Georgetown, Jonestown, Round Rock in Williamson County and northwest Austin in Travis County. At issue are the district's book club reading list, where students are allowed to pick one book from a list of 15 titles chosen for their grade level around a theme each semester. All middle and high school English classes are part of the book club and the idea is to let each kid pick what interests them. However, parents have objected to the choices that their children are being given and the school district have already agreed to ban The Lottery, Kiss Number 8, Laura Dean Keeps Breaking Up with Me, The Handmaid’s Tale, Y: The Last Man, and V for Vendetta, have "paused" the choices of a few others (like My Friend Dahmer) and are considering banning more.

This is just the start. Remember how conservatives are in a frenzy about critical race theory, even though they don't usually understand what it is? Well, not understanding something actually helps the cause of censorship.

Kentucky House Bills 14 and 18, which hope to outright ban certain topics and books from schools under the guise of avoiding “division between, or resentment of, a race, sex, religion, creed, nonviolent political affiliation, social class or class of people” are causing major damage to free speech. In the schools themselves, local decrees, made in fear of these proposed bills, are just as damaging, if not more so, due to their vague nature. My school’s English department has been instructed by multiple administrators in the last year not to teach anything “racial,” and our superintendent has requested anything “sexual” or “racial” be discussed with administrators before being presented to students.

The people behind this censorship are firmly rooted in the current zeitgeist, and their views are shared by administrators across the country: They believe the presence of race, gender and LGBTQ identities to be potentially problematic or disruptive. That silences teachers who want to be team players or just keep their jobs.

Speaking of censorship, you can't discuss this topic and not mention anti-BDS laws - a favorite of the right-wing. 33 states that have passed legislation punishing boycotts of Israel by states in the last 7 years.
Texas' anti-BDS law lost in court this week. Ant-BDS laws have lost four of five lawsuits on freedom of speech grounds. It's only win was in Maryland.