Hello; Kinda figured the conversation would get around to this. First thing is does not matter the why if a dog is a biter it should not be loose. Regardless of the reasons I will do my best to finish off any dog that bites me. Guess I am fortunate i am not in the secret service.I definitely believe this.
But I do not totally buy into the old cliche. Some dogs get to be mean all on their own. Some are helped along by owners to be sure. I was around my neighbors dog last fall when it was a pup during the remaining fall days. The dog knew me. The dog knows most of the neighbors from that time.
I know the people. I just do not picture them doing anything to make the dog act the way it does. They have not trained it well and the old man tries his best to ignore the current problems. This dog does what it does of it's own choice. I suspect some herding instinct at play because it goes for the lower legs from behind. may be the dog is stupid and is trying to herd the people in the neighborhood. I am beyond considering such.
Too many folks have a Star Trek sort of mentality. By that i mean in all the episodes I have seen of all generations some clever insight into an alien fixes things in the end. I do not doubt some on here from a few years ago will root for the dog if it left me laying in a pool of my own blood.
That the old man down the lane just wants what he wants, there is no doubt. That he will not bother to train the dog is very likely.
If i have misconstrued your intent, I apologize. Went thru a long back and forth with several on here about Pitbull dogs some years ago.