Acting Columbia University President Claire Shipman on Wednesday bizarrely chose to stoke the flames by acknowledging arrested ex-grad student Mahmoud Khalil at the Ivy League school’s chaotic graduation. Hordes of graduating students in the riled-up audience began chanting Khalil’s name and nearly booed Shipman off the stage throughout her remarks at the embattled university’s commencement. “We firmly believe that our international students have the same rights to freedom of speech as everyone else, and they should not be targeted by the government for exercising their right,” Shipman told the crowd of nearly 37,000. “I know many in our community are...