Why does the author show the terrible things as anonymous

The Terrible Things are one of the main characters in the short story. The description the author offers about them is extremely limited but the impression left is that they can easily scare those with whom they come in contact with. The Terrible Things have a great power over the others and no one dares to step up and argue with them. The Terrible Things are free to do whatever they want and together with their terrible nets they catch the creatures living in the clearing one by one until no one is left. The Terrible Things represent here the Nazi government who for the duration of the Second World War behaved in whichever way they saw fit without being told to stop.