He has always been cold, but it seems when people really need help, this behavior becomes even more profound. He also strangely steals despite being well off. Has someone come across this type of behavior? If so, how did you deal with it? Is there a definition to it? I just wish I could understand his strange hostility and maybe try to help him. He was the second of five children and well taken care of by his mother. Thanks.
Your brother is the way he is and I wouldn't worry about it. His relationship with your mother is between him and her. You can only let him know the things he needs to know and the rest is up to him. The stealing? I have no idea. Some people do that even if they don't need. I had a brother (dead now) who would steal anything that wasn't nailed down. It didn't matter if he needed it or not. He was crazy like that. I couldn't explain why he did it, but I knew that he would, so I learned to secure anything that I didn't want stolen.
I'm so sorry to hear about your brother's behaviour. I wonder if you can suggest he get some counselling or see a therapist. I know no one wants to admit it including myself, but we all have some mental health issues to work through when it comes to our relationship with our parents. This lack of empathy towards his own mother sounds troubling to me.