When the truth is not on your side one thing you can do is to try to change it, and when that doesn't work, outlaw it:
Under the culture war rallying cry of combating “critical race theory” — an academic framework centered on the idea that racism is systemic, not just a collection of individual prejudices — [Republican] lawmakers have endorsed an extraordinary intervention in classrooms across Texas.
Their plans would impose restrictions on how teachers discuss current events, bar students from receiving course credit for civic engagement and, in the words of advocates, restore the role of “traditional history” to its rightful place of primacy by emphasizing the nation’s noble ideals, rather than its centuries-long record of failing to live up to them.
So much for freedom of speech.
Now, I am sure some pseudonymous troll will point out that liberals support restrictions on teaching creationism, but that is not true. What we oppose is teaching creationism as science because it isn't. I'm sure most liberals would be more than happy to have creationism taught as part of a class on comparative mythology or comparative religion. I certainly would.
Conservatives can't handle the truth. Conservatives fear the truth. So they have to stamp out the truth because the truth is not on their side.
Unfortunately, it is far from clear that they won't succeed.