My dad's (84M) friend recently committed suicide over an argument with his wife. It was a pointless argument about nothing. My dad is struggling to understand how this happened.

His friend was 79 years old. He had lived through the second world war, fought against Nazi Germany, was married for over 50 years, and was a wonderful man and a great friend. He was an outdoors man who loved walking in the forest and playing football with his friends. He had nothing to be sad about.<br><br>Two weeks ago his wife, his best friend, his only friend, had an argument with him about the fact that he was taking longer walks than usual. She was angry because he was not at home when she wanted to see him, and she wanted to kill herself over it. This argument culminated in him going out for a walk in the forest and shooting himself in the head.<br><br>He was found by his wife and his family, who are all still grieving the loss of their wonderful friend. My dad is trying to understand why he would do such a thing over such a trivial thing. He has been depressed since the war and has been lonely since his wife passed away 10 years ago.<br><br>This has shaken my dad and many of their friends. They are struggling to understand how such a wonderful man could do such a thing over nothing. My dad is trying to find out what happened in those final days, but he is still struggling to understand why he would do this.<br><br>What would you do if your partner were to tell you that they had had an argument with you and were going to go out for a walk? Would you be angry and try to kill yourself, or would you be sad and try to comfort them?<br><br>Would you kill yourself over an argument about nothing?<br><br>This has shaken me deeply. I hope that you never experience anything like this.<br><br>&#x200B;