The way to frame everything Trump says is "does this get a reaction in the moment?" If you think of things in terms of "does this sound like a policy statement from a world leader?" you will never grasp the man. It's entirely about immediate, quantifiable reaction in the moment. And, since he is never held accountable for anything that he says, he has no reason to approach any public appearance using any metric other than what causes him immediate, quantifiable gratification.