McCain was a fool of a man to enlist and go to Vietnam. Smart and intelligent men didn't serve the U.S. army for the Vietnam conquest. Some of the smart ones were called "draft dodgers" and got the hell out of Dodge while they still could. Even at that time many a man knew the war was not for some false ideal called "democracy" or to protect Americans. Today, of course, only the veriest fool enlists to fight for Jewish/Cabalist/Masonic/American imperialism -only the best of morons need apply. He's no hero for invading his fellow man's lands and killing his fellow man. Anyone who thinks any American soldier who takes part in these marauding adventures needs to gives his head a shake.
So, starting as a fool, he became a crook, a pathological falsifier, and a swindler for his bosses; and, he cooked up death potions everywhere he could. The death of other men with whom he shares this world, and the destruction their lands and property, means nothing to him. McCain always was sick, but now his sick brain is rotting to the point where he may not be able to harm any more men. That is a good thing.