I think this was staged by the dog and squirrel in the hopes of getting their own reality show.
-KeithP
Obviously this was only the dog's staged event.
The dog is drawing attention to the racism it is subject to at the hands of squirrels and squirrel apologists.
The dog never meant any harm, and never even attacked the offender. The dog was the subject of a brutal unprovoked, and unjust, attack. It was simply offering to play with the youngin', and the mother would have none of that and instead attacked, thinking that all dogs will attack any squirrel with no purpose. The squirrel is just applying a level of hate and fear to all dogs, and took it out on this one.
I'll defend your honor innocent dog! This seems to be drawing the attention of racists and I will not stand for this!