>I doubt you've known many pit bulls if you classify them as aggressive. Every pit bull I've had or known has been super gentle.

I grew up in a rural area where people had watchdogs, and some of our watchdogs were pit bulls, so I've probably "known" more pit bulls than you have. Just because a dog is "super gentle" most of the time doesn't mean it isn't aggressive in a confrontational situation or when its instinctual prey drive kicks in. Most pit bulls used for fighting are gentle outside the fighting pit. The two pit bulls that killed the Bennard children were super gentle until the day they decided to kill the kids.