I have read some stuff online about one of the Coptic popes, Kyrillos IV, who, while still widely admired, also (allegedly) initiated a period of iconoclasm. In this book
(Among the Copts
by John H. Watson) it says that he was enthroned in 1854 and was a "reforming" patriarch who revitalized Coptic learning, brought in printing presses, and did valuable diplomatic work in Ethiopia. But he was also educated by Protestant fundamentalists and, under their influence, instituted a period of iconoclasm "greater than the Bolshevik destruction of icons." He saw the Copts as primitive and idolatrous. He forbade icons in his cathedral and Copts began burning icons in the streets. The author claims that this iconoclasm "still has supporters today." The book then goes on to describe how iconography was revived by people like Isaac Fanous in the mid-20th century.
Has anyone else read or heard about this supposed iconoclastic period?