Iconoclast (noun)

1. A person who attacks or undermines traditional ideas or institutions.
2. A person who destroys religious images or opposes their veneration.

Origin:

Late 17th century: via latin from greek eikonoklastēs "image breaker", from eikōn "image" + klan "break".

Examples:

1. He was considered an iconoclast because of his unorthodox views on religion.
2. The iconoclast philosopher Friedrich Nietzsche attacked traditional morality and religion in his writing.
3. The iconoclast artist Marcel Duchamp challenged traditional notions of art with his ready-mades.
4. An iconoclast is someone who challenges and questions the established ideas and norms in any field.
5. The Iconoclast was a newspaper in the late 19th century America, which was known for attacking traditional religious and political beliefs.