Iconoclasm (noun)

1. The rejection or destruction of religious icons and other symbols or monuments, usually for religious or political motives.
2. The rejection or destruction of established ideas, customs, or institutions.

Origin:

Mid 16th century: via latin from greek eikonoklasmos, from eikōn "image" + klan "break".

Examples:

1. The Protestant Reformation in the 16th century was marked by widespread iconoclasm, as many churches and monasteries were stripped of their religious imagery.
2. During the French Revolution, there was a wave of iconoclasm, as many statues and monuments were destroyed.
3. The term iconoclasm can also be used to refer to the rejection of established beliefs or institutions in any field.
4. The iconoclasm of the avant-garde artists of the early 20th century rejected traditional notions of beauty and representation.
5. The iconoclasm of Silicon Valley startups, which often reject established business models and industries, has led to a wave of innovation and disruption.