Everyone thinks they're Galileo. Who would ever stay with the side they think is wrong and cruel? History (i.e. future opinions) will assign the labels.
If someone joins a mob against a single person, odds are that their self-identification as Galileo is ... unsound.
Really the problem is not with liars, it is with liars that wield lots of influence, power -- and try to actively and systemically circumvent existing law.