Just days before Univision announced it would host a Republican debate, one of its top executives likened a Republican candidate to alleged mass murderer Dylann Storm Roof. Alberto Ciurana, Univision’s president of programming and content, made a post on his official Instagram account last week that appeared to indicate that there were similarities between Trump and Roof, who last week killed nine people in a shooting at a church in Charleston, S.C. The since-deleted Instagram post received hundreds of likes from Ciurana’s 116,000 followers on the site. It also received backlash. “With all due respect, what happened last night is not a...