Who are the groups that claim that pit bulls are great?

Very easy. The BREEDERS and DOG FIGHTERS. They don't want regulation of these dogs because they make a LOT OF MONEY breeding, selling, and fighting them.

All the pit bull people have the same propaganda about how "loving" pit bulls are.

However, pit bulls are number one on the list for KILLING PEOPLE.

No surprise, because pit bulls are bred to be aggressive and have been for hundreds of years.