They are counting on people not noticing the absurdity, because they don't notice it themselves. They live in an ideological bubble where those who are True Believers prosper and heretics are punished, so even those who disagree have to go along and hope they aren't discovered. Or they have to leave. So no one inside will be heard to disagree. So anyone on the outside who disagrees with what we all agree is true is spreading "misinformation", according to everyone on the inside who feels able to speak freely. Surely it is no impediment to the free expression of truth to ban lies, right? Right! Does anyone here disagree? No? Of course not. Only a nazi would object to preventing the spreading of lies.

So in the Puritan Village, the ministers give themselves freedom of religion awards for their contributions to freeing the True Religion from all impediments to its universal imposition.