I don't mind explaining him a little.
He simply can't understand that other people can feel anything, at all. He will kick a dog, because he is curious about what happens when he does. He doesn't approach it from a violent place. Like, he isn't interested in hurting the dog, hurting the dog is just what he has to do to fulfill the curiosity. (Does that make sense? I am having a hard time articulating.) We were at a local water park and a child started having a serious allergic reaction to something. All the kids were curious about what was happening, but he actually got a chair and treated it like a circus. He hopes for the very worst thing to happen to the child, because he thinks it's cool to watch. (We did not allow him to each like that, but it's certainly what he wanted.) He is very cunning, manipulative, and can lie with the best of them. To be truthful, he was different from birth. He would cry and cry and cry. For hours on end. Not just colic, but screaming raging crying fits until he had no voice. They did all kinds of medical tests, thinking he must actually be in pain. They never were able to find something wrong with him. When he was around 8 months, he started throwing violent fits if he did not get what he wanted. He would throw things at the windows and try to break them. He would grab hair and try to headbutt whoever was carrying him. One time I was picking him up, because we were at someones house who didn't have outlet covers. He was very curious about them and I was concerned he would stick his finger in. (Teething baby, wet fingers, outlet...not a good mix, lol.) He actually tried to stick his fingers into my eyeballs and bit me so hard on the cheek I still have a slight scar. He from a very young age gets mad at the person he hurts. He's mad that we are upset, because in his mind he is always in the right. (This can be a very common child mentality, but his is more extreme than even close to the norm.
His behavior is very dark, and very concerning. To his fathers credit, he has really tried to help for a long time. Psychologists of course can only do so much with a child this young. Most children grow out of their lack of empathy, is what they've said. While they are concerned, they can only assume his is young and will mature. Right now, it's just specialized therapy to help with empathy and other people's feelings. I try to be hopeful for him, but he seems to be a very violent criminal in the making. I hope all this therapy helps him.