Police arrested a Rhodes Scholar from Georgia Tech at this week’s Jewish-led Never Again Action protest at the Atlanta Immigration and Customs Enforcement field office. In a guest column, Calvin Runnels, a native of Baton Rouge, explains why he protested and why more Americans ought to join him. (He and another activist were charged with disorderly contact under a city ordinance during Monday’s protest, which drew more than 100 people.) Runnels graduated Tech last year with a bachelor's degree in biochemistry. One of 32 Rhodes Scholars in 2018, he is pursuing postgraduate studies at the University of Oxford. He is...