My brother just told me that I was selfish and walked out on my family when I decided to study and work out of state.
Why did he think that was selfish of you?
I have no idea this hit me out of nowhere.
It is understandable to be upset that your brother told you off and you don't understand why. You should talk to him after he is more calm to find out why he was so angry at you. Maybe you can also ask your mother why he was upset.
This is so disappointing. I won't talk to him and neither will I talk to her.
If you don't talk to them, then you won't find out why they were so upset. It might cause them to lash out at you again if you do whatever made them angry. Even if it is hard, you should try to have a conversation with them.