3948. Who the Iconoclasts were and what part in the early church schism they represented hardly can be discerned at this great historical distance. Persons with some knowledge of the history of religion will tell you that it was an argument about pictures and sculpture. The Iconoclasts were against pictures and picture making, basing their opposition to images on the Second Commandment.
3939. The Second Commandment reads, “You shall not make for yourself a carved image—any likeness of anything that is in heaven above, or that is in the earth beneath, or that is in the water under the earth."
3950. The above commandment is very simple and clear and is hardly capable of being misinterpreted. It might be considered to be very important, since it was second in God’s list of no-nos. But even thought it was obviously very important, nowhere in Christendom can it be said to be obeyed, and everywhere it is entirely ignored.