noun
iconoclast
eye-KAH-nuh-klast/aɪˈkɑːnəklæst/
Someone who attacks established beliefs or traditions.
The iconoclast challenges the institution's exclusionary barrier.

Etymology
A breaker of images became, by extension, someone who attacks established beliefs.
More examples
- The artist is an iconoclast who rejects accepted conventions.
- An iconoclast may question traditions others take for granted.
Forms
iconoclast
Similar words
- nonconformist
- May simply depart from convention without attacking it.
- reformer
- Seeks improvement and may preserve many established beliefs.