Yes the dog was being loyal, thats what dogs do, they are loyal to their owners. So yes the dog was doing right by his owner or family. However, it is the owners responsibility to keep that dog in check and not be loose to have the ability to go up to anyone. Yes people are unnecisarily scared of pitbulls, and a pittbull off of a leash is especially scarry for someone who is not used to being around them. But the owner or another family memeber should have gotten the dog under control and out of the situation so that the dog would not have the chance to interact with the cops.
End of story, its the owners responsibility to take control of their animal, and these people clearly didnt.
The WPD did their job and they did what they needed to do to keep the situation under control