iconoclast
Pronunciation:
/aɪˈkɒnəklæst//aɪˈkɒnəklæst/noun
Definitions
One who destroys religious images or icons, especially an opponent of the Orthodox Church in the 8th and 9th centuries, or a Puritan during the European Reformation.
Antonyms:iconoduleOne who opposes orthodoxy and religion; one who adheres to the doctrine of iconoclasm.
(by extension) One who attacks cherished beliefs.