As mentioned earlier, smaller dogs tend to be much more aggressive and defiant than larger dogs. Smaller dogs are allowed to get away with a lot more due to their size. Things like laying on their owners lap. That's a huge no-no, but small dogs can get away with it. No good owner wants their huge dog to jump up on people when they enter their home - so they train them. I grew up three different dog breeds over the years - Airedale Terrier, German Shepard and a Jack Russell. The Jack Russell was by far the worst of the three. There are home videos of me being an asshole to the Airedale when I was two years old - pinning him down by sitting on his stomach and shoving grass into his mouth. That dog loved every minute of it.
And Izo's persistent "4.5 million, half are children" thing is pissing me off. That's not what the stats said. The line was "Each year, 800,000 Americans seek medical attention for dog bites; half of these are children." So there's that. Izo is just jelly he can't own an awesome pit bull.