Hi _inthelight_

I am glad you made it through
The situation with your brother sending those disturbing texts sounds very difficult though. His behavior is extreme, there are different ways to handle things and though you might have handled it differently, you did what you did to protect yourself.
Your brother is an adult an he is responsible for taking care of himself, that is not your responsibility. You can be caring, but ultimately you aren't responsible for him and the poor choices he makes.
I fully did NOT expect him to confront me about whether or not I had received his texts or calls in front of everyone but that’s exactly what happened.
Was that all he said or did he also go into the specifics of the texts he sent you?
Did I do the right thing or should I re-address the situation with him?
It might help to replace 'should' with 'want to'. Do you want to re-address the situation with him? Do you think anything positive will come out of it considering his NPD, history of addiction and all your past experiences with him?
The Board Parrot