He has new hearing aids but still misses much of the conversation. I have explained to him that he cannot get angry with people when he cannot hear them saying Hello. He wants to come to school events and athletic events for my children but makes the group of people sitting around us so uncomfortable with his comments about their rudeness and lack of manners. I have been sitting off to the side away from the group but when a friend comes over to talk he gets mad at the person for not saying Hello and then starts cussing in German. This morning he was very upset with me for talking to him about it. I would like some suggestions.