It appears he sought attention and got it.
IMO, of course.
I don't know the entire story behind this incident. I don't know what the guy said to the police or how much a disturbance loud music can be when officers are doing their job. All I have is common sense and if the music prevented them from doing their job, then how much did it help to leave what they were doing to arrest the guy and then shoot the dog? Did that help to calm the noise? I still didn't see anyone turn the music down in the car.
I do not agree with people who strap n their .44 and look for a police officer to approach them; however, if it's legal, why would any officer have to give that person the attention they are looking for? It seems to me the only people really looking for attention from the police are those who are breaking the law. If no law is being broken, then people should be left alone!