Learn how to say Iconoclasts correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word iconoclast:
1a person who attacks or criticizes cherished beliefs or institutions.
2a destroyer of images used in religious worship, in particular:
historical a supporter of the 8th- and 9th-century movement in the Byzantine Church which sought to abolish the veneration of icons and other religious images.
historical a Puritan of the 16th or 17th century.
mid 17th century (in iconoclast (sense 2)): via medieval Latin from ecclesiastical Greek eikonoklastēs, from eikōn ‘likeness’ + klan ‘to break’