U.S. DIPLOMATS WALK OUT ON CUBA AT UNITED NATIONS

I see today on CNN that the U.S. was a no-show for the speech by the Cuban minister at the United Nations, just as it was for Iran. I don't get it. If the U.S. perceives another country as an "enemy," then it refuses to listen to its delegates or engage in negotiation or diplomacy. Something is wrong in this picture. This is how wars start, especially wars started by the U.S.