Idiotism

His constant need to be right was an idiotism that often got him into trouble.

The company's insistence on perfection was a defining idiotism of their brand.

The family's tradition of eating pizza every Friday night was a beloved idiotism.

The community's idiotism was their love for annual block parties.

Her idiosyncratic speech patterns were considered an idiotism by her classmates.

The organization's idiotism was their focus on community service.