Heresy of the Week

The folks who ascribed to this heresy seem to be have been of the "mean, loveless Christian" variety:

Iconoclasm (7th and 8th Centuries)
This heresy arose when a group of people known as iconoclasts (literally,
"icon smashers") appeared, who claimed that it was sinful to make pictures and
statues of Christ and the saints, despite the fact that in the Bible, God had
commanded the making of religious statues (Ex. 25:18–20; 1 Chr. 28:18–19),
including symbolic representations of Christ (cf. Num. 21:8–9 with John 3:14).
From Catholic Answers.