In a way they are right. Abraham, whom Muslims, Jews and Christians see as their ancestor, spoke for God, as did Moses, in calling for the destruction of idols. The First Commandment says, "Thou shalt have no other gods before me."
What amazes me is that in a world where millions of babies are killed through abortion, women are abused, Christians are slaughtered in the Sudan for their faith, wars rage, terrorism flourishes and all sorts of other evils against humanity are practiced, the arts crowd is upset about the destruction of statues. What's wrong with this picture?
Would that these people exercised some outrage against the destruction of humanity at least as much as they express outrage against the destruction of idols.