The emperors and their supporters who wanted to suppress the cult of icons were called

Those attempting to suppress the cult of icons were called iconoclasts. An iconoclast is someone who attempts to suppress religious beliefs or cherished attributes of a religious or spiritual nature. Here, the cult of icon was being suppressed and they argued that their religious beliefs were being suppressed. Thus, the emperors and their supporters were called iconoclasts.

I'm pretty sure that's called a volcano