In his Inaugural Address on Jan. 20, President Donald Trump pledged “to immediately stop all government censorship and bring back free speech to America.” It was a shallow pledge. That much is made clear by the Trump administration’s escalating crackdown on U.S. visa holders who have criticized Israel, expressed support for Palestinian causes, or both. Secretary of State Marco Rubio this week suggested that he had canceled “maybe more than 300” visas belonging to what he described as “lunatics.” Also this week, Immigration and Customs Enforcement or Department of Homeland Security agents detained Rumeysa Ozturk, a Turkish PhD student at...