It is commonplace in war to demonize the enemy. The purpose is to scare your troops, even more to make them so furiously angry they will not hesitate to kill. The civilians back home must understand the enemy are monsters.
The Japanese did this incredibly well in the island battles of World War II. The Japanese propagandists convinced civilians that the Americans would rape and kill and even eat their children. So frightened were these civilians that they threw themselves off of cliffs rather than surrender to the invading Americans who were shocked and heartbroken to see the broken bodies of mothers and children at the bottom of cliffs.
See the full article by Austin RUse, September 29, 2023