It isn't a matter of being in denial, it is a matter that you could not be more misinformed then you are showing to be. At no point in time were pitbulls genetically engineered to harm a human, in fact it is 100% the opposite and pits that showed human aggression were actually put down.
The complete OPPOSITE of what you are attempting to pass off as fact is actually true.
Due to the lack of human agression pits are very infrequently used as guard animals, outside of people just being scared of them and sometimes used as a visual deterrent.
We don't even lock our doors, not because our dogs would stop someone from coming in, but because they sound like they would not be very welcoming. If you did decide to come in they'd just jump up on you (working on that) wanting to get pet, we'd then proceed to get robbed. If the theif left the front door open the dogs would probably all just run to the car they were loading with my tv.