Ben Platt spoke out Wednesday after a group of “really disgusting” neo-Nazis protested the musical “Parade” outside the Bernard B. Jacobs Theatre. The Tony-winning “Parade” tells the true story of Jewish factory worker Leo Frank, who was wrongfully imprisoned in 1913 in Georgia after being accused of raping and murdering a 13-year-old girl. He was abducted from jail and lynched. Previews began on Tuesday for the revival, which officially opens on March 16. A video posted on Twitter by the Forward’s engagement editor Jake Wasserman shows anti-Semitic protesters, who call themselves the National Socialist Movement, shouting hateful rhetoric. “You want...