I have no issue with not caring for a person in your family. But be up front, be honest, and then be DONE. That isn't what he's doing.
I'm hurt because he's a phony and acts like he wanted to have a relationshipbut not really any of the responsibilitiesthat go with it. His offense and anger is the excuse to justify deliberately shifting all mom's medical expenses onto me when he knows I'm not in the greatest financial situation.
This memorial service is his last act of disdain for her.