I also watched recent video of ISIS members in a museum smashing (alleged) archaeological relics from the very ancient Mesopotamian past. I felt a certain sense of historical irony while doing so. I wondered as I watched them use sledgehammers and power drills on a 3,000 year old Assyrian statue if they realized that they were following the ancient Assyrian playbook as they tried to erase the region’s past. The Assyrians of that era were masters at the art of atrocity marketing. The concept of publicizing horrific cruelty to cow and intimidate subjects or opponents has a long history, and only fell out of style relatively recently (and not everywhere).
It’s only in the last century or so that public executions, for example, have become rare. Having people view a burning, beheading or hanging (with or without a torture appetizer) was thought to be something that reinforced law and authority and demonstrated that justice was being carried out. Often it was thought an edifying thing to have children watch.