These people will claim they were 'silenced' regardless. Even as they appear with their published bestseller about being silenced on every podcast and news broadcast under the sun, they will speak of the 'conspiracy' working against them at every step. The actual facts at hand almost never matter.
Even at a press conference where the President is speaking on your behalf they'll speak of the 'groups' that are 'against' them, full of nefarious purpose.
There is no magical set of actions that changes the incentive they have to lie, or believe lies. (except regulation of snake oil, which is not going to happen any time soon)
In general, you can't argue or 'fact' people out of beliefs they were not argued into. The best you can do is give them a safe place to land when disconfirmation begins. Don't be too judgy, no one is immune to propaganda.
