There's NO "aggressive" dog breed!
A Chihuahua can have a meaner attitude than a Rottweiler, if you raise it properly. It has NOTHING to do with the dog. It is how a human, or its environment, treats it. A dog, much like a human, will be mean and fight for its life, if it needs to.
It's fight or flight! Fight for survival.
I have had Dobermans, Wolves, Shepherds, Rottweilers, Pitbulls, and Boxers. You wanna know the meanest of ALL of them was? My Jack Russel. Who is a foot tall.
All of the other breeds cuddled up to me every night, gave so many kisses, and were the most loveable creatures. You can't ban owning a dog. What's sick is that they don't ban dog fights or ban people who are bad with dogs, from getting one! These poor creatures are perfect, loving, adoring animals who just want love, pets, a family. They don't ask for the suffering but people still put them through it.
There's NO such thing as an "aggressive breed" -- The only thing that makes someone afraid of a dog is the strength, size, and demeanor behind him. But I promise you, no dog is EVER born mean!