piss off
So you don’t want advice or support, you just want to start a fight.
Piss off yourself. You were about to shoot someone elses dog, off your property, because your dog attacked it. Your dog’s “territory” does not extend to the street outside your house. If you had shot that dog in the street, his owner could have sued you and won, and you might have faced criminal charges as well. You are lucky your mom stopped you and your neigbor intervened.