Dogs of a given breed are not all alike in personality, nor are any other animals. Same thing for snakes, & while most BPs have a docile nature, a relatively
small number do not. This is most likely just his genes...but also, he might be hurting (internally) & because of that, he is even more defensive. Have you
ruled out health issues? Was he ever accidentally dropped or squeezed? It's more likely just fear on his part...& as already noted, make sure you aren't
LOOMING over him when you approach.