I conclude that finger-poking joe wanted them to humiliate this country. The last conscious act of his fading mind was to sell out his country. The country that pays his salary. As his mind deteriorates even further he will find it harder to enjoy the reward that awaits him for his betrayal: a LOT of money (disguised as a book deal), a mansion, and an enormous legacy for Jill.
Since “country” is an abstract concept that few liberals can wrap their minds around, I would say Joe just listened to the Sixties Radicals in his circle and thought he could be the hero for arranging an abrupt pullout - and at the same time give a gift to Xi Jinping so he will keep what he knows about Joe and Hunter to himself for a little while longer...