What’s remarkable is that he probably actually believes what he tells the UN.
In an implicit rebuke to Putin, who earlier this month in an article in the New York Times, criticised Obama’s belief in US exceptionalism, Obama said: “Some may disagree, but I believe that America is exceptional — in part because we have shown a willingness, through the sacrifice of blood and treasure, to stand up not only for our own narrow self-interest, but for the interests of all.”
This blindness that varies from obstinate to willful is baffling to those who are not true believers in the American religion. To explain it requires another resurrection of the Chomsky chestnut that you can’t rise to a position of power in the US government unless you believe that the United States is unique in history in acting purely from altruistic motives. What we do, though it require “the sacrifice of blood and treasure”, we do for ourselves but also “for the interests of all”. As Madeleine Albright put it in another context, if we have to sacrifice Syrian lives, we believe that's a price worth paying. After all, it's for everyone's good, whatever they themselves might happen to believe.