Lee Martell said it best in his post at #9.
In many cases like this, aberrant behavior by the dogs is an indication of aberrant behavior by the owners.
German Shepherds are an intelligent breed and can be well trained.
The Bidens had the money and time to do have the dogs properly trained, but as has been my experience, no matter how well a dog is trained, if the master is deficient (as the Bidens clearly are) the dog is going to fail.
This is all on the Biden family. They are evil, and it is expressed in the behavior of their dogs.
Nice take.