1) Byzantine Iconoclasm 2) Christian term 3) Heresy 4) Heterodoxy 5) Unorthodoxy 1) Heresy 
Iconoclasm is the deliberate destruction of religious icons and other symbols or monuments of one`s own culture, usually for religious or political motives. It is a frequent component of major political or religious changes. The term does not generally encompass the specific destruction of images of a ruler after his death or overthrow (damnatio ....
attacking of established beliefs
• (n.) The doctrine or practice of the iconoclasts; image breaking.
The deliberate destruction of religious icons (statues and relics) thought to offend. This took place in the Reformation and probably other periods, such as the Roman.
I·con'o·clasm noun [ Confer French iconoclasme . See Iconoclast .] The doctrine or practice of the iconoclasts; image breaking. 
[n] - the orientation of an iconoclast
iconoclasm 1. The action or spirit of iconoclasts. 2. The beliefs, practices, or doctrine of an iconoclast. 3. A challenge to or overturning of traditional beliefs, customs, and values. 4. The destruction of religious images used in worship, or strong opposition to their use in worship.
the breaking of religious imagery (statues, stained glass, crosses etc) in belief that they represent idolatry [qv].
noun the orientation of an iconoclast
Religious struggle against images (8th and 9th centuries) and towards symbolic art. -- L.V.
the action or spirit of iconoclasts.