A malfunctioning teleprompter and a failed escalator were far from the only UN dysfunctions Mr. Trump highlighted in his speech. On the institution’s 80th birthday, Mr. Trump assailed the fundamental sensibilities that have guided the UN through its several decades. As in many of his domestic speeches, Mr. Trump noted the sharp reduction in migration into America. Mr. Trump said that while he had stopped illegal entry into America, European prisons are filled with migrants. While Mr. Guterres highlighted the UN’s 80th anniversary, Mr. Trump wanted the world to marvel over next year’s celebrations of America’s birth on July 4, 1779.