He has a documented history (charitably) overly-optimistic claims and (accurately) lies. On multiple occasions, he (or an unnamed disgruntled employee who happens to share his exact views) has manipulated the output of his own chatbot to push particular political positions.
He's very unlikely to actually do this, and if he did, it would not do what he describes.
All he would be doing is documenting the fact that right wing propaganda is poorly rooted in facts.
But then again, a lot if what Musk does is the same. FSD is not really "full self driving". And he has filed a motion in federal court to keep crash data away from the public.
So he may try to do this but he won't do it in the straightforward way you would expect. For example, he may combine this with using legal means to impede wikipedia.
Sadly, it has become abundantly clear that facts don’t matter when forming opinions.