When people hate on others, it's only a mere reflection of their own misery and unhappiness and rarely has anything to do with you. You called him out on the teasing and drew a boundary, and he didn't like it. This person isn't worth the effort or thought given how nasty he is, WWII vet and caring caretaker or not. He's nasty. Just ignore him and his miserable, hatred filled self and be happy yourself. ((((Hugs)))))