Why did artistic works of the life of Christ become so controversial in the 8th and 9th centuries?

Throughout the clarification portion elsewhere here, the definition of the query has been mentioned.

Explanation:

Since there would be enough that-called Iconoclastic Debate throughout the Byzantine Empire throughout the 8th as well as 9th centuries, about which some assumed that portraying Jesus Christ on icons was a heresy therefore that they'll be destroyed. This controversy has been a very essential consideration including its Empire's daily life since this battle seemed publicly backed by certain kings, and also had monks marry icons to have been excluded from either the church.