hate AJ after the kidnapping. The kidnapping happened in 2005 what about before then? Sonny and Carly truly hated AJ before the kidnapping. They were truly vile to him before that. Those are the things people are debating. In addition to what pushed AJ to the point of kidnapping those children.
To me he included Kristina because Alexis helped Sonny. He included Morgan because Sonny and Carly took Michael away. He wanted each parent to suffer the same loss. It was twisted and cruel but I get it.
Also as a mom I would hate anyone who did that to my child. However, no matter what happens my ex wouldn't be the one to do it because I would never play those games with him. So IRL chances of things going to that extreme are highly unlikely.