According to the study he references, Pits are not aggressive temperament.
https://youtu.be/7Rl5ftWrk6s
Here, Cesar talks about how through different decades it has been different breeds that were ostracized (Dobermans in the 70s, Rotweilers in the 80s, etc.) and how Petey in The Little Rascals was a pitbull. Funny how society/culture views things differently nowadays.
https://youtu.be/lcV2uoG9RtE
Finally, this guy makes some great points and gives some great advice on Pitbulls.
https://youtu.be/pgnZsw8U4t4