Dumbass liberal take.
The unwritten rules of society rely on people acting in good faith. If someone just honestly believes that the moon landing was fake or fairies are real or whatever, cool, I don't really give a fuck.
As soon as your dipshit beliefs start negatively impacting other people, especially when they're provably false, you invite any and all criticism. The social contract is broken.
This is just the paradox of tolerance except "bullying is bad"