https://www.aljazeera.com/opinions/2023/1/15/critical-race-theory-no-critical-race-fact
The banning of thought shows the fear that the radical right has for anything that contradicts their conspiracy theories. It's admittedly difficult to defend a theory for which there is no evidence. It's also difficult to defend obviously racist tropes.
It's easier when you are preaching to the believers on the radical right. There, the simple tropes are amplified by the right's already established mindset. Obviously, when you get into the wider world, it all breaks down.
The isolation which results from use of the internet means that the radical right gets reinforcement for their fears from the only sources to which they are listening. In fact, not only are they isolated, they are often told what they should fear.
