I mean, the moment he used a holy knight skill would be the moment you stopped looking down on the jobless class right? He's cleaving chunks out of the fort and the guy is still like "Lol why are you so trash jobless??". Would someone really think like that?
Lots of people have a hard time changing their mind even when they are wrong. Even if they are proven wrong over and over they'll try to convince themselves they were right all the time and any evidence to the contrary is just a mistake to overlook.