Talk show host Bill O?Reilly called him “a loon.” The head of a conservative think tank said he fed students propaganda and egged on a student “mob.” The comments were directed at UW-Madison?s Chief Diversity Officer, Damon Williams, who has been at the center of an admissions maelstrom ever since the Virginia-based Center for Equal Opportunity alleged in a report this month that the university gives preferential treatment to black and Hispanic students.