This is a Nazi's wet dream, because they have always been enemies of thought, and now they have a machine that eloquently sells their animalistic ideas.
Also, in the age of online communications, when information can be limitlessly copied, it’s impossible for authoritarians to destroy information they disapprove of. It is possible, however, for them to make it difficult to find by flooding the world with vast quantities of plausible-looking alternatives to it, making it hard to identify what is real. Before LLMs, doing this at the sort of scale that would have been effective was prohibitively laborious.