I know, everybody's talking about this.
I want to ask, first, is it whatever meds he's on or is his reading disorder (S-RCD) getting perceptibly worse? He sounds completely unable to guess what's coming next as he sounds out each word, and I don't think he knew what he was saying here until the sentence was over and the audience started laughing, even though the writer (most will think Bolton, because of the "sovereignty" theme but I'd say Miller, who believes the same garbage anyway) did a good job of putting it in his own voice.
The affable-sounding response to the laughter, "Didn't expect that reaction but that's OK," is extremely angry, I think. In the assertion that he's the one who decides whether it's OK or not. He often says things like that when he's frightened by his own rage—a favorite is when he's calling out some opponent's disrespect and says, "And that's fine." I can't stop myself from suspecting that Miller or whoever put the sentence in there on purpose, knowing how it would be received, to start moving Trump to think about withdrawing the country from the UN altogether ("The Atlantic Charter was the worst deal every made in history!"). The way somebody else tried last Friday to start Trump thinking about firing Rod Rosenstein. It's only the second best way to manipulate him, using his anger, but whoever it is is looking for results that flattery won't achieve.
Also see Aaron Blake/WaPo.