Former U.S. Secretary of State John Kerry on Sunday warned that “true civil discourse” is under threat around the world while speaking to graduates at NYU Abu Dhabi, an event that the school blocked journalists from filming. While obliquely criticizing President Donald Trump, Kerry did not mention the 2015 Iran nuclear deal he secured with other world powers, an accord of which Trump now has pulled America out. […] While never naming Trump, Kerry began his remarks by saying: “Given what’s going on today, I’m glad to be invited anywhere, folks.” He quickly added that the U.S. “needs to build...