We had a Pit & another mutt - yes the pit bull was good natured and polite, gentle under normal circumstances, easy to train to be obedient to me - but she was strong as fuck, and if another dog, including our other dog, wanted to fight, she was all in, I do think they are bred to fight. Thankfully she moved out when my daughter moved down the street from us, we would have kept her or the other dog but not both of them. We still get to see her & my kid gets to see the mutt, they are practically next door, but it’s better with them living in separate houses.

All that to say - yes they are just dogs, trainable and sweet. But so so strong and willing to fight, you have to be able to redirect them quickly if they see another dog get aggressive.

ETA: we never once saw her START a fight. She was a little anxious about men but not at all naturally aggressive, liked other dogs; and we trained her to accept people better. It was my other dog who would snap at her. But once it started both of them lost their damn minds. We didn’t plan for two dogs, one was left chained on our porch by I don’t even know who. One dog two cats is the ideal pet situation.